Really cool I enjoyed it. The only remarks I have on this is maybe making the difficulty progress more progressively, I feel at one time it begins to spawn a lot of enemy without smooth progression.
Adding a hight score could be a good idea too.
Viewing post in Junkship Turbo GMTK jam comments
Originally I was hoping to have multiple levels to play through and maybe upgrades between, but it all got scoped out in favor of a more basic difficulty curve that shortens enemy spawn times. I agree with your feedback, it's either hard because you're not used to the mechanics yet, or too easy once you've gotten enough to just tear through everything. I'll try to address it soon!
High scores is a good idea too, especially if there are leaderboards to compete on >:D Thanks for playing!