Hm... Dante meets Mega Man (and shoots him)
Well, the music doesn't loop, the controls are slow to respond (except turning around, yet if you try moving while you jump, you will continue the jump animations as you walk?)
As it's a platformer, I can understand the lack of a story/background; but why is it made noir-esque then? As such, the character seems out of place as the "bad ass hero with a katana and a handgun" fighting robots with shields and laser swords in a Mega Man type environment.
Also, I didn't end up getting to the end, but after four or five maps, I intentionally threw myself off a cliff and went from 4 Lives to -3 and got a game over. I didn't see a role for the HP at that point, as the enemies were too slow to even attack (I even tried letting one).
BUT OH MY GOD YOU HAVE NO PRELOADER.
AND IT'S WHITE.
No, concern yourself more with what you want the game to "feel" like, first.
4/10 since it's a first submission, first attempt, and you have some animations down. Scripting needs work, but this could turn out to be a relatively fun game.