Cute game. Artstyle is charming and pleasing and the music is pretty nice (though maybe it should be a little bit more upbeat), and the level design itself is simple, yet fairly challenging right from the onset. Bosses are intimidating at first, but they can still be learned and beaten with enough experience. Bit of an odd compliment, but I love how you actually ascend from jumping off of ladders, and can just monkey back and forth between them.
The game isn't without issues though. Now, I prefer Mega Man's lack of aerial momentum, so playing a game clearly inspired by that series apply it threw me off a bit. But it's something I eventually got used to, even if the converyor belts made it pretty annoying in that second stage.
I can also get behind a wall jump that doesn't let you climb walls a la MMX and simply pushes you off the wall like in Mario. What I can't get behind is that when you jump off a wall, you cannot alter your jump arc until you land, which makes it more commital than I feel needs to be. Also, when you stick to a wall, you're clinged to it even if you let go of the directional button, and having to press down to get off a wall felt clunky. I also don't like how holding jump when you stick to a wall makes you automatically jump off from it. This, combined with the already commital jump, makes it very easy to accidentally launch yourself into whatever you were trying to avoid to begin with.
Lastly, and by far my biggest gripe, the arm cannon. For some reason it refuses to rapid fire on command. Attempting to do so will cause my character to just fire one shot, then fire after I already started falling. This makes any situation where I have to defeat an enemy at a higher altitude than me a gigantic pain, since I'm stuck with just firing at an opponent one shot at a time, which honestly would be less irritating if my character couldn't rapid fire at all.
But yeah, if you plan on work on this further, I'd love to see the results. This has potential to be a great experience... it just needs a bit of fine tuning.