This was really fun, although it does run into the same problems as many Roguelites due to the difficulty decreasing as you play. One way to fix this would be to artificially raise the difficulty in tandem with the player getting more upgrades. Maybe add mouse control as well to make the ship easier to move around and point at a specific spot? Apart from that, though, I don't really have much to say, it was cool!
GMTK has a good video on roguelites: