This was fun! i generally dont like this kidn of games but i enjoyed this.
was missing hearing some pew-pew sounds.
difficulty ramping was on point (i couldnt get past lvl 5 xD )
the randomization of patterns from the boss made it hard to learn or predict everytime i retried lvl 5 (i suck at these games so i cant get any better besides learning the patterns)so that adds difficulty but also may prevent some players from being able to enjoy progress.
variation in the boss you are figthing, maybe some smaller enemies spawning that try to crash into you
was not super fan of the "going back to main menu" everytime i either ran out of lives or progressed.