As others have said, I like the idea of losing abilities as a mechanic in the game. It gives a nice twist on the normal progression mechanic.
I found the game fairly easy to get through even without attacking anything. This is mostly to do with the low damage the enemies did, even when I was bouncing off them.
The movement and response felt really nice, easy to handle and control.
One maybe bug I found was hitting enter again after the game started seemed to finish the game (got a "Thanks for playing" screen) and I had to restart the game.