It works now, thank you. A fairly simple game with pretty colors that could be expanded upon in interresting ways. I can already see this being a rhythm game where more difficult levels have monsters with irregular heartbeats that you have to move in sync with.
At some point, I fell into a hole in the middle of the level and nothing happened. Maybe there should be a check for whenever that happens so you can respawn the player. It would also be nice to have a retry option after losing the game.
Otherwise, nice work!