I like the idea of being your own bullet hell boss a lot =)
The special slowed the game down a bit but was overall fun to use. Not sure why it cost coins to use other than that's what sleezy mobile devs tend to do, it probably would've been better if it was skill based instead (ie charging up by defeating the green dudes before going all out on everything else). The game also stopped working at level 14 and wouldn't let me clear it.
Great job overall though!