I played the game several years ago, and remember very few details. The game has 2D platformer like view. You control a flock of sheep: jump over holes, spikes and enemies; pick up coins. When you lose all sheep, you spend coins to buy more sheep and some upgrades for them, and restart the same level with more powerful flock. And so until you pass the game (I don't remember that I did it). Help remember the game title, please.