Open up the screen.
Overall it wasn't bad. First few levels were a bit odd, but it helped to explain the game. Would have loved a story to go along with what was happening and the ability to use keys instead of a mouse and more variety of music.
One thing I would like to see changed is that you can use the full screen to move. That was perhaps the most annoying aspect for me in this game, is whenever I'd have to dodge near the top of the screen I'd slam into an invisible wall by the scores. The bottom allows you to move beyond the combo/redrum, so it felt a bit odd having the top blocked off.
Overall it was fun and different style of bullet hell, granted a bit on the tamer side. The upgrade system is a good idea and has potential to keep people playing to find the best combination of upgrades for them.