Fun game, I played it a lot! I easily reach the final boss, but I can't beat it.
I like the movment, it's a bit tricky at start, but once you get used to it you can travel really fast. It demand some skill from the player it's fun to learn how to use it correctly.
The fire rate is quite high, I would prefer to keep the mouse button pressed with automatic fire instead of having to constantly click.
I like the fact that the space ship change color each run, is a small detail but I liked it.
In the end is a solid submission, very fun to play again and again!