Remove some unnecessary files from the binary bundle.

Makefile

@@ -61,7 +61,16 @@ serve: game.wasm
 
 bundle: game.wasm
 	rm cirkoban.zip || true
-	zip cirkoban.zip -r assets/ reflect.js game.js game.css reflect.wasm wtf8.wasm game.wasm index.html
+	zip cirkoban.zip -r assets/images/*.png \
+                            assets/sounds/*.wav \
+                            assets/fonts/*.woff2 \
+                            reflect.js \
+                            game.js \
+                            game.css \
+                            reflect.wasm \
+                            wtf8.wasm \
+                            game.wasm \
+                            index.html
 
 clean:
 	rm -f game.wasm game.zip $(levels)