Catculus / 黑猫心算
https://github.com/js13kGames/catculus/tree/ac347d7668586758545c922fe18f076f42407b4d

Fixed letterboxing/fullscreen pointer coordinates and duplicate music listeners; deferred playback until interaction.
修复画面留白时触点换算、全屏坐标与重复音乐监听，音乐改为点击后启动。