Not bad
I thought this game was ok, but there was a bug I did run into. I was playing normal and everytime I pressed Retry, all the homing enemies I was avoiding would spawn again within 10 seconds or a restart. The first time I did a retry, I ended up starting with 3 homing enemies, then the next time 4, and it just goes up from there.
Also, I think the powerups should start showing up from round 1 instead of round 4.
Nice game, but it has a rather nasty bug in it.