Great game, except
I made it to level 32. And I died. And I was forced to restart.
I like the game but I'm a bit angry right now. lol. Make checkpoints, or a level select! Why should I have to go all the way back to the beginning every time? I want to see the end of the game, and with such difficult levels I doubt that'll happen because I can't practice--if I try, and I end up dying, I have to start all the way over. That's a big game-design no-no.
Other than that, it's a great game. Controls are a bit difficult but it kind of seems to be part of the game itself. Would have liked more conventional controls but it didn't make the game too awkward.
Great sounds, graphics, etc. Loved the ninjas. Hated the lasers. Haha.
Oh yes, before I forget, you should fix the bounding box with the pits. I was still half on top of the ground and I died anyways.