I did not get past the second level and ran into some issues but definitely enjoyed the game.
I loved the colors, the music and the animations. The way the background moves in the first level is so interesting and definitely had me doing a double take. The first boss was also a very clever twist and a pretty difficult boss.
The button for shooting wasn't that comfortable for me but the movement was. I also had some issues with horizontal platforms and the fact you do not actually move with them. It make level 2 very difficult because I kept sliding off.