I can definitely see where your influences lie
MegaMan, Battle Toads and Metroid.
In my opinion, the controls are spot on and par for the course for this style of game.
Level design (so far) is ok. It is a little tedious, but the original Metroid was INCREDIBLY tedious, so kudos for striking a good balance in the level design between Metroid and MegaMan.
My biggest complaint is in the art work department. If Who did the aesthetic design is 10, well then keep up the good work. You'll only get better. Otherwise find a friend who can properly design the visuals.
My second complaint is the music. Each song taken on its own is good and suits the moods of their levels/events, but an overall vibe is lacking. Find one single person to make all the music so there is an overall sense of coherence.
Your strengths obviously lie in the programming/engineering/design field, so recognize your weaknesses, focus more energy on your strengths, and get a couple people to pick up the slack.
Overall i'm having a lot of fun with the game. Favorited! :)