It's a good game with mechanics much like many platformer side scroller game. Although I think the most difficult part here is the momentum it takes to jum a certain distance and direction. Also it's a difficult game seeing that the space to dodge my enemies bullets and whatnot is rather small. But I feel it's part of it's originality and maybe changing it may not be for the better.
The art is pretty classic like a retro gameboy advance video game. Looks full of pixels and functions that way too.
It's a pretty long game with full of puzzles as well. Makes me wonder why isn't there a proper story. But nonetheless it's a pretty simplistic puzzle game thats pleasing to watch.