found this one recently. starts out ridiculously easy/boring then the levels get harder. I can't beat the last level, been replaying the rest trying to get 3 gold stars on all. it's highly addictive if you like these types of games.
http://www.kongregate.com/games/avoxgames/jellygo
http://www.kongregate.com/games/avoxgames/jellygo