The voice acting was awesome, a game worth playing, Science Ninja idea is awesome, can't wait for the next one. I agree with all the points that rubikks made, but also, with all those power-ups you could at least make one that increases the power bar or something.
Also agree with HappyMango's points about the slide and double jump, and perhaps add some power-up that helps you FLY!!! LOL, but seriously, that would be cool (Glide ability isnt nearly as awesome, since you just unlock it at the end of the game so you dont even bother using it).
Would have also liked some cinematics too, if you need help with that I'll lend it.