Nice use of sound effects and music, like switching weapons to the type of enemy.
Sometimes you could hurt others with different colors, playing for too long if felt too repetitive like it doesn't get harder just less enjoyable.
Rolling is a bit too delayed and I felt like the bullets could be a little faster since enemies never stood still long enough.
Overall good graphics but it lacks something maybe making an ending screen after 10 or 15 rounds, I played until the 16th round.