Really fun game! My 2 pieces of constructive criticism is I would have liked it if the main ship was a little different color from the clones so it was more easily noticeable (I know it had a glowing light behind it but it took me awhile before I noticed, wasn't immediately obvious)
The second thing is I would have liked a little break after I lost a life to get a little breather. Like used the time skip power code to pause the game while a respawn animation played out (kinda like geometry wars)
Well done! Excellent gameplay loop!