Geez the bullet hell of bullet hells! That was really fun, but very difficult! Funny enough, I could only beat the third stage, but I loved the little dialogue touch toward the end and the changed behavior ... making me have to get to the blue finish once the timer concluded was cruel, but made for a really exciting and tense escape sequence.
I really liked this. Some of the ball interactions in the first level are a little odd, sometimes one ball seemed to weigh double the other balls and would just plow through them, but overall it made for a hectic and fun experience. I tried just hanging out in one corner, thinking I'd be safe ... but you did a really good job making sure no one spot was safe and the player has to stay on the move and planning.
The story from the game's page is nice and gives a good narrative and reason for doing what I'm doing as a player, but I think you could have worked that into the game, even if it was just a title screen with that same story. Some folks might jump right in and miss it.
I'm going to return later to try my hand at the other levels because this was really fun. Great work!