Fantastic Contraption is the only flash game I've ever paid for. This game is so much fun, you should check it out.

http://fantasticcontraption.com/

With that said, here's a Haiku dedicated to it. Because I love writing Haiku's about games :o)

Go, my spider bot!
Don't go upside down! Damnit!
Retry, yes... YES, woot!