Krashlander - Ski, Jump, Crash! by Jeff Weber of Farseer Games is the game you get if you combined Solipskier with Angry Birds. Really, it's a naturally evolved version of Diver 2 mixed with a bit of Ski Stunt Simulator. Defending your world from robot invaders is as easy as skiing down a hill. Unfortunately you've got to be a bit self-destructive in order to be a hero. Good thing you brought multiple lives!
Diver 2 is a physics-based game of cliff diving created by Jeff Weber of Farseer Games. Its simple premise sticks you on top of a cliff and says "ok, now jump gracefully into the water and land between the markers". Riiiiight. Doing that perfectly (and on the first try) is about as easy as teaching a cat to sing a canzone from Rigoletto. With a little practice, though, you'll get it right. The dive, not the singing cat bit.