First of all, my respect to your audio guy. I also liked the way you walk player through the tutorial and overall controls.
A couple of minor bugs:
- I can see there's some text under the Difficulty slider, but there's no way I can read it.
- The Difficulty slider doesn't affect the "Difficulty: 3" text, it's always the same.
- Not sure if it's a bug but you land straight on a umm... damage-dealer at level 3 and stay with 2/3 health points from the beginning.
Other than that I did truly enjoy the game, great job!