Haven't seen issues with the other games so far, but Cat Cafe is pretty screwy on my Mac. I get a white window after the initial "Nya" animation. Pressing esc brings up the quit menu and triggers a repeated "meow" sound effect, but I can't actually play the game.
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Sorry about that - I don't have a Mac to test on, so I probably won't be able to fix it.
It's possible that a newer version of Flashplayer might help. I don't know anything about Macs so I can't think of much else to try at the moment. Cat Cafe is the only game in the collection that renders graphics with the GPU though, so it will be in some way related to that.