Aww those cute legs were a nice touch. The music was very nice and fit with the under-earth environment. Graphics were consistent throughout and the running water was nice.
In terms of critical feedback, the main thing is the dialog disappeared too quickly for me to read, so it took me awhile to figure out what to do the first time I gained an ability. Also, my keyboard layout is not QWERTY, so depending on what module/library you use for doing input in your game, it may be more accessible/international-friendly.
Great work! Takes a lot to make a game.