You did a great job on this game. It's simple to pick up and play, yet engaging with its unique control scheme, and the variety of enemy and level types keeps things interesting as you progress. I like how the bosses test the skills you learned in the levels, like the second boss making you move through the gaps in its attacks, just like how the walls made you move prior. There's no real criticism I have to make; the closest thing to it would be that the bosses take a long time to kill without a shot speed powerup, but that gives you more time to choke and make mistakes when fighting them, so it works.
I got a score of 1170 points on my second try, after I had figured out the game's mechanics and controls.