No idea why you dont like it
I love this game, the movement is my favorite part.
Visuals are stunningly good for a flash.
Would be nicer if some of the levels were more "open" with less obstacles.
Obviously it was short so i dont need to go into that.
Perhaps your gun upgrade could progressively get better?
Also i loved your ideas with the bone doors, perhaps make the switches harder to find?
And explain the DNA feature because i had no idea what was going on with that.
Lastly when you get hit, have mabye a second of invincibility so you can get away? i got stuck in the boss and it killed me cause i couldnt move away.
When the game is longer, checkpoints at the key doors would be nice ;)
Great game, just giving some ideas for your next one ;)