Thanks for uploading this! Yeah, you encountered a couple of issues I was aware of but didn't have time to resolve - in particular the movement controls (which I've already been working on improving), and the potential softlock on stone tiles. Also, I should have explained how the hearts work: for each floor you fall, you lose 1 heart when you land, which is why you died upon falling in your first run (it was 3 floors) but not the times after.