Hmm, the more i think about it the less i like the game, because of the circles it is too much dependant on luck, you can only get a good score if you're lucky enough to have your square reduced a few times. Also the score is sort of worthless as the skill part is getting squares, and getting more squares in less time actually results in a lower score, whilst requiring more skill.
For any game that has an element of luck in it, your score will get higher as you play it more, because the more you play it the more you get in lucky and luckier situations that allow you to get such a high score. A game where the most favourable strategy is to play it for a long time and to stay in the center to avoid risk and aquire less squares so you get more powerups, is not really worth the rep prize for a highscore if you ask me. It tests my patience far too much.
Edit:
Also it fucks with my head, as for at least 10 minutes after playing it i'm twitchy and avoiding buttons and images on websites that may hurt me if i touch them....... Grr!