Pretty simple yet fun gameplay loop! I think while there are some small things that need polishing, there also are small details that I really appreciated. Like the way you prevented the player from spamming gravestones to clean, it feels better and more rewarding to press the button calmly at set intervals, than to just keep mashing it :D About the polish, if I may, I would suggest that check the collision box of the pillar like tall gravestone; maybe add a sound cue before the grim reaper appears; and prevent coins from dropping unreachable areas. Solid work overall, nice game!