I love the graphics, (GameBoy 4 color ftw!) but I wish you would stick with it! The other colors seem out of place and jarring against a nice soothing GB color scheme. I'm curious why you made the decision to not allow the player to stop moving? It just feels like an artificial way to make the game more difficult :/ Maybe if there was a reason to it (i.e. the world is made of ice or something) it would feel better.
I want to back up all of these points. I wish it were a true GB color palette - I'm confused now as to why it has extra colors sometimes, and it loses its sense of style there. Not stopping also seems like it would hurt controls.
Also wish that the jumping visual was more limited. Having a beam go from you all the way to the wall, looking that pretty... definitely doesn't feel like Gameboy graphics. The death animation though? Spot on! So, I would have loved to have seen the "jump beam" just as limited as the death animation.
Congrats on getting it out the door though! Once it hits Android, (if ever) I'll pick it up