Hell yeah, you've got a volume slider. However, it doesn't change the menu music, which is really loud. Still, the thought counts for something!
Interesting combat system, never seen anything done like that before!
Couldn't work it out the first time, then realised 'the correct button' meant the coloured ones. It would have been nice to be able to skip the introduction when you're playing through it again.
The random level generation is cool, but it gives up control over the pacing of the game. You can't precisely control how many enemies a player will have to deal with. I got a massive stack of enemies in a corridor!
The music could use some work, there are some glitches where it stops playing when it shouldn't, but it's nice to have a combat theme.
Some sort of automap could be useful to help with the navigation, especially with only one type of wall.
If there was some more player feedback, it could make the game feel a lot more substantial for little work, whereas now the game sometimes feels like it's animating "at you".