I'm on a click at the minute to complete every last one of my games, I came back to Osmos and was fully enjoying it up until a certain level, I won't specifically mention it so that it stays mysterious to new gamers (however it was the one that was potentially going to be made simpler for the mac version). This level had me playing for literally 5 hours trying to complete it, and I still didn't manage it, i was on the verge of a break down.
Long story short I came back to it a week later and completed it in around 10 minutes... by pure fluke.
Great game and I'm very impressed, however if it was meant to chill me out I think it failed
Highly recommend it to anyone considering buying it, and it's cheap so where can you go wrong.
Eufloria next which my brother tells me is ace.