Great entry.
Some simple improvement suggestions: screen-wrapping, completed controller support (I noticed there's move and jump but no attack), and screen-shake (and maybe a bit more effectiveness) on the "glory slam" move.
There might be a bug with the amount of time it takes to re-start a 3-hit combo if the player is button mashing, but this is quite tidy. I'd like to see a larger world and more story behind this!