It's a really nice game. The core gameplay is really solid, it's easy to understand simple to play.
I've finished the game and I really enjoy my session.
2 points that may be improved is :
-Movement, at some point there's no real challenge to move, just stay at the bottom and just go left and right. It would have been nice to have things that force you to move and put yourself in more dangerous positions
-Enemies, maybe a different pattern to create more challenge.
It was really fun, really great ideas and I've rated it :)