Honestly, really want more levels. The idea is super and I'm EXCITED about the implementation, it must be hard work. However, the difference in gameplay between the second and third level is barely felt. It feels like there should be at least 5 difficulty levels.
Also some sort of bonus at the end is missing. When you reach the max difficulty level, and hit 100+ again, the message just repeats. As far as I'm concerned, it's missing some kind of insanity.
Not enough flexible customization for me so far. There is a problem with recognizing feet and armpits (especially with a raised arm).
Not enough custom game modes and such so far.
However, I did enjoy it VERY much. Hope for development. Respect to the author.