Woo! I haven't reached them yet, but I have another request. Can you make the end-of-level-delay a bit longer so that we have time to pickup that last powerup dropped before the level switches? Often times the level switches before I can fly up and grab it.
Edit:
Ahh!! I got the new upgrade!! But then lost it in the next level and was reset back to the start of the weapons

I'd like to beg that I either get to keep the blue level, or that the enemies don't get so much faster quite so soon! I feel like the game would be better to last longer. Perhaps if they increase in number on odd levels, and increase in speed on even levels?