Rename game from Whack Hare! to Nyuller

All references updated:
- src/build.sh: PRG=nyuller.prg, D64=nyuller.d64, disk name 'ny',
  all grep/pgrep patterns updated, all comments updated
- All 10 header files: include guards WHACK_HARE_* → NYULLER_*
- C source comments: 'Whack Hare!' → 'Nyuller'
- README.md: updated build command output path
- GAME.md: title updated
- tasks.md: all whack_hare.prg → nyuller.prg
- src/AGENT_CONTEXT.md: project name updated
- tools/convert_screens.py: project name updated

Build artifacts renamed: whack_hare.* → nyuller.*, whack.d64 → nyuller.d64

Note: title screen image (source_images/screen_title.png) still shows
'WHACKED' logo — that's a visual asset, not a code reference.

GAME.md

@@ -1,4 +1,4 @@
-# GAME.md — *Whack Hare!*
+# GAME.md — *Nyuller*
 
 A two-player reaction-time duel for the Commodore 64. Two players stand
 back-to-back, take ten paces, and the first one to hit fire when the

README.md

@@ -32,7 +32,7 @@ git submodule update --init --recursive
 
 ```sh
 cd src
-./build.sh            # compile main.c → build/whack_hare.prg (-O1)
+./build.sh            # compile main.c → build/nyuller.prg (-O1)
 ./build.sh -e         # run in oscar64's built-in emulator (headless, fast)
 ./build.sh -p         # PLAY: launch VICE in background (see build.sh --help)
 ./build.sh -v         # run in VICE x64 (foreground, blocks terminal)

src/AGENT_CONTEXT.md

@@ -1,6 +1,6 @@
-# Project context for Whack Hare! subagent
+# Project context for Nyuller subagent
 
-You are implementing one phase of a C64 game called "Whack Hare!"
+You are implementing one phase of a C64 game called "Nyuller."
 (quick-draw duel between a rabbit and a kid on a scooter, first to 5
 wins). You will be given a specific phase task. This document is the
 context you need to do the work.

src/audio.c

@@ -1,4 +1,4 @@
-// audio.c — SID audio service for the Whack Hare! state machine.
+// audio.c — SID audio service for the Nyuller state machine.
 //
 // The audio layer is a thin state-driven service.  The game's
 // per-state "enter" actions call audio_state_enter() to set up the

src/audio.h

@@ -1,7 +1,7 @@
-#ifndef WHACK_HARE_AUDIO_H
-#define WHACK_HARE_AUDIO_H
+#ifndef NYULLER_AUDIO_H
+#define NYULLER_AUDIO_H
 
-// audio.h — SID audio service for the Whack Hare! state machine.
+// audio.h — SID audio service for the Nyuller state machine.
 //
 // The audio layer is a thin state-driven service: the game's per-state
 // "enter" actions call audio_state_enter() to set up the SID for that

src/banner.h

@@ -1,5 +1,5 @@
-#ifndef WHACK_HARE_BANNER_H
-#define WHACK_HARE_BANNER_H
+#ifndef NYULLER_BANNER_H
+#define NYULLER_BANNER_H
 
 // banner.h — text banner rendering in the multicolor bitmap.
 //

src/build.sh

@@ -2,7 +2,7 @@
 # build.sh — compile and optionally run a single C64 program with Oscar64.
 #
 # Usage:
-#   ./build.sh            # compile main.c → build/whack_hare.prg (-O1)
+#   ./build.sh            # compile main.c → build/nyuller.prg (-O1)
 #   ./build.sh -e         # run in oscar64's built-in emulator (headless, fast)
 #   ./build.sh -p         # PLAY: compile, wrap in .d64, launch VICE x64 detached
 #   ./build.sh -P         # PLAY: same as -p but with VICE x64sc (cycle-exact)
@@ -17,11 +17,11 @@
 #   ./build.sh -g         # compile with -g (adds source-level debug info)
 #
 # Output (in <repo>/build/):
-#   whack_hare.prg   — loadable C64 program (run with x64, VICE, or real hw)
-#   whack_hare.asm   — full 6502 listing
-#   whack_hare.map   — region/section/object placement
-#   whack_hare.lbl   — VICE monitor label commands
-#   whack.d64        — disk image wrapping whack_hare.prg (for VICE autostart)
+#   nyuller.prg        — loadable C64 program (run with x64, VICE, or real hw)
+#   nyuller.asm        — full 6502 listing
+#   nyuller.map        — region/section/object placement
+#   nyuller.lbl        — VICE monitor label commands
+#   nyuller.d64        — disk image wrapping nyuller.prg (for VICE autostart)
 #
 # For the development loop, use -e (oscar64's built-in emulator). It runs
 # without a display, needs no ROMs, and is faster than VICE. Use -p when
@@ -48,8 +48,8 @@ ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
 OSCAR64_DIR="$ROOT/oscar64"
 OSCAR64_BIN="$OSCAR64_DIR/bin/oscar64"
 BUILD_DIR="$ROOT/build"
-PRG="$BUILD_DIR/whack_hare.prg"
-D64="$BUILD_DIR/whack.d64"
+PRG="$BUILD_DIR/nyuller.prg"
+D64="$BUILD_DIR/nyuller.d64"
 
 mkdir -p "$BUILD_DIR"
 
@@ -58,14 +58,14 @@ if [ "${1:-}" = "--kill" ]; then
 	# pgrep -f uses ERE: + is a quantifier, so the regex must escape it.
 	# x64(sc)? matches both "x64" and "x64sc".  The process is launched
 	# with the literal argument string `+confirmonexit`.
-	pids=$(pgrep -f "x64(sc)? \+confirmonexit.*whack\.d64" 2>/dev/null || true)
+	pids=$(pgrep -f "x64(sc)? \+confirmonexit.*nyuller\.d64" 2>/dev/null || true)
 	if [ -n "$pids" ]; then
 		echo "killing VICE process(es): $pids"
 		kill $pids 2>/dev/null || true
 		sleep 1
 		kill -9 $pids 2>/dev/null || true
 	else
-		echo "no VICE process running (autostart of whack.d64)"
+		echo "no VICE process running (autostart of nyuller.d64)"
 	fi
 	rm -f "$BUILD_DIR/vice.pid" "$BUILD_DIR/vice.log"
 	exit 0
@@ -132,11 +132,11 @@ build_d64() {
 		echo "error: c1541 not found (needed to build the .d64 wrapper)" >&2
 		return 1
 	fi
-	c1541 -format wh,of d64 "$D64" >/dev/null 2>&1 || true
+	c1541 -format ny,of d64 "$D64" >/dev/null 2>&1 || true
 	c1541 "$D64" >/dev/null 2>&1 <<EOF || true
 write $PRG
 EOF
-	if c1541 "$D64" 2>/dev/null <<EOF | grep -q "whack_hare.prg"
+	if c1541 "$D64" 2>/dev/null <<EOF | grep -q "nyuller.prg"
 list
 quit
 EOF
@@ -151,7 +151,7 @@ EOF
 # --- optional actions -----------------------------------------------------
 case "$EMU_CMD" in
 	"oscar64")
-		echo "running whack_hare.prg in oscar64's built-in emulator"
+		echo "running nyuller.prg in oscar64's built-in emulator"
 		"$OSCAR64_BIN" -i="$OSCAR64_DIR/include" -o="$PRG" $OPT_FLAGS -e "$SRC"
 		;;
 	"x64"|"x64sc")
@@ -160,7 +160,7 @@ case "$EMU_CMD" in
 		if [ -z "${DISPLAY:-}" ]; then
 			echo "warning: no \$DISPLAY set; VICE won't show a window" >&2
 		fi
-		echo "running whack_hare in VICE ($EMU_CMD, blocking)"
+		echo "running nyuller in VICE ($EMU_CMD, blocking)"
 		"$EMU_CMD" +confirmonexit -autostart "$D64"
 		;;
 esac
@@ -176,9 +176,9 @@ if [ -n "$PLAY_VICE" ]; then
 	fi
 	# If a previous VICE is still running, kill it before launching a
 	# new one — otherwise the two windows will fight for the same
-	# display and the old one's whack_hare will keep running in the
+	# display and the old one's nyuller will keep running in the
 	# background.
-	existing=$(pgrep -f "x64(sc)? \+confirmonexit.*whack\.d64" 2>/dev/null || true)
+	existing=$(pgrep -f "x64(sc)? \+confirmonexit.*nyuller\.d64" 2>/dev/null || true)
 	if [ -n "$existing" ]; then
 		echo "killing previous VICE process(es): $existing"
 		kill $existing 2>/dev/null || true

src/draw.h

@@ -1,5 +1,5 @@
-#ifndef WHACK_HARE_DRAW_H
-#define WHACK_HARE_DRAW_H
+#ifndef NYULLER_DRAW_H
+#define NYULLER_DRAW_H
 
 // draw.h — DRAW screen counter rendering.
 //

src/game.c

@@ -1,4 +1,4 @@
-// game.c — Whack Hare! state machine.
+// game.c — Nyuller state machine.
 //
 // See game.h for the transition diagram and game_init() / game_step()
 // documentation.  Each state has an "enter" action (set the screen,

src/game.h

@@ -1,7 +1,7 @@
-#ifndef WHACK_HARE_GAME_H
-#define WHACK_HARE_GAME_H
+#ifndef NYULLER_GAME_H
+#define NYULLER_GAME_H
 
-// game.h — Whack Hare! state machine.
+// game.h — Nyuller state machine.
 //
 // States (see game.c for the per-state behavior and the transition
 // diagram from GAME.md §9):

src/input.h

@@ -1,5 +1,5 @@
-#ifndef WHACK_HARE_INPUT_H
-#define WHACK_HARE_INPUT_H
+#ifndef NYULLER_INPUT_H
+#define NYULLER_INPUT_H
 
 // input_fire(port) — returns 1 if the fire button on the given joystick
 // port is currently pressed, 0 otherwise.

src/main.c

@@ -1,4 +1,4 @@
-// main.c — Whack Hare! entry point (Phase 5: raster IRQ + idle loop).
+// main.c — Nyuller entry point (Phase 5: raster IRQ + idle loop).
 //
 // Flow:
 //   1. memmap_setup()      — bank out KERNAL/BASIC/CHAR ROM.

src/memmap.h

@@ -1,5 +1,5 @@
-#ifndef WHACK_HARE_MEMMAP_H
-#define WHACK_HARE_MEMMAP_H
+#ifndef NYULLER_MEMMAP_H
+#define NYULLER_MEMMAP_H
 
 #include <c64/memmap.h>
 

src/notes.h

@@ -1,5 +1,5 @@
-#ifndef WHACK_HARE_NOTES_H
-#define WHACK_HARE_NOTES_H
+#ifndef NYULLER_NOTES_H
+#define NYULLER_NOTES_H
 
 // notes.h — 16-bit SID frequency values for the musical notes used by
 // the game.  PAL C64 (985248 Hz system clock); see the oscar64 sid.h

src/score.h

@@ -1,5 +1,5 @@
-#ifndef WHACK_HARE_SCORE_H
-#define WHACK_HARE_SCORE_H
+#ifndef NYULLER_SCORE_H
+#define NYULLER_SCORE_H
 
 // score.h — score state and rendering for the top-of-screen score bar.
 //

src/screens.h

@@ -1,5 +1,5 @@
-#ifndef WHACK_HARE_SCREENS_H
-#define WHACK_HARE_SCREENS_H
+#ifndef NYULLER_SCREENS_H
+#define NYULLER_SCREENS_H
 
 // Screen IDs.  Pass to show_screen() to switch to a new screen.
 #define SCREEN_TITLE		0

src/tick.h

@@ -1,5 +1,5 @@
-#ifndef WHACK_HARE_TICK_H
-#define WHACK_HARE_TICK_H
+#ifndef NYULLER_TICK_H
+#define NYULLER_TICK_H
 
 // tick.h — 50 Hz raster IRQ setup for the game tick.
 //

tasks.md

@@ -1,4 +1,4 @@
-# Tasks — Whack Hare! implementation plan
+# Tasks — Nyuller implementation plan
 
 A phased, testable plan. Each phase ends with a *verify* step that
 proves the phase works. Each phase is one or more commits. Stop at any
@@ -171,7 +171,7 @@ state.
 - `cd src && ./build.sh -e` displays the title screen in the
   oscar64 built-in emulator for 5 seconds (or until fire is pressed)
   then exits.
-- (Optional, interactive) `x64 build/whack_hare.prg` in a real
+- (Optional, interactive) `x64 build/nyuller.prg` in a real
   terminal session displays the title screen on real timings.
   Compare visually to `source_images/screen_title.png`.
 - The .map file shows our code is in $0900-$1100-ish, well within
@@ -304,7 +304,7 @@ random source.
 **Verify:**
 - The game still works in the oscar64 built-in emulator
   (`build.sh -e`).
-- (Optional, interactive) Launch `x64sc build/whack_hare.prg`
+- (Optional, interactive) Launch `x64sc build/nyuller.prg`
   in a real terminal to confirm the game runs at cycle-exact PAL
   timing (50.125 Hz). The state transitions happen on the right
   raster lines. The 50 Hz tick is rock-solid.
@@ -363,7 +363,7 @@ becomes audible.
   - GAMEOVER: longer fanfare.
 - The cues are recognizable and feel right (timing, volume).
 - (Optional, interactive) Run the audio cues under `x64sc
-  build/whack_hare.prg` in a real terminal to confirm the
+  build/nyuller.prg` in a real terminal to confirm the
   SID envelope generator timings are right; the oscar64 emulator
   is fast but not always bit-accurate on SID timing, and the
   `x64sc` cycle-exact path is the one that matches real hardware.

tools/convert_screens.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """Convert a C64 game source PNG into multicolor-bitmap .bin + .attr files.
 
-Phase 1 of the "Whack Hare!" C64 project. See tasks.md for the full spec.
+Phase 1 of the "Nyuller" C64 project. See tasks.md for the full spec.
 
 The C64 multicolor bitmap mode (VIC-II $D011 BMM=1, $D016 MCM=1) is a
 160x200-pixel, 2-bits-per-pixel, 4-colors-per-4x8-cell format. The