Your game does just well as a very simplistic platformer.
I liked the premise the game bases itself on, but i find several downsides that make this a rather mediocre game:
*Repetitive music
*Almost absolute lack of action. I was promised superpowers, but besides double-jumping, i don't see the hero doing anything impressive at all.
*The boss is way too easy. I didn't kill him since even with the gun fully upgraded i couldn't just deal enough damage. Surviving him is what i mean. His bullets are too easy to dodge, making getting to him the hard part, which would be the actual 'boss'
To sum up: the lack of atmosphere and challenge makes this game just entertaining, which, i believe, justifies my rating.