Freezes my MacBook!

I would normally give Space a 4 or 5 star rating, but the new update has been horrible. Things went smoothly for the first 20 games, but starting with 21, every time I let the score/stars total up at the end, my computer completely freezes with the score showing and a little whirlpool rotating near the center. I cant exit or even shut down my computer because the game is "running". I have to hold the power button down for five seconds to force a shut down. And this now happens on every game in Space, not just the new ones, although other worlds (Rio, etc.) still work okay. I sent an inquiry to Rovio two days ago, but I havent gotten a reply. Im still using OS 10.6.8 (Snow Leopard, I think). Any ideas?

SSnoid about Angry Birds Space