You have to place the colored shards on Flandre's wings (arrow keys move, space places). You get points for matching colors and eliminating them, but you have to keep her balanced or she'll fall over.
555 is my best so far. The trick is to either match three color shards in a row (red/red/red) or sandwich the colors (red/green/red) to eliminate them. The further you advance, the faster the time gauge decrease, and her balance becomes more sensitive.
After you score pass 500ish, you get a playable "extra" level on the menu in which there's additional shards (dark green, violet, etc.), time gauge is shorten, and her balance is very sensitive.
I have become addicted to this game and music.
Notes: -Left/Right arrow key to move -Space bar to place color shard (or time gauge automatically places it) -An extra shard is given (violet) after surpassing a score of 300ish -Each eliminations add three points to the score. -The game continues even if all color shards are eliminated (just place the next one near the middle)