Guide your cool little space dude through each of the levels and out the exits at the end. As you're in space you'll need to play with gravity, and there's also Moon rock and other things you need to gather to make it through the exit!
If that game was your kind of genre then head on over to the HAG Physics area or maybe just play HeliCrane, Amigo Pancho 5: Artic & Peru and the gory Rock Vs Zombies. If you just want to stick with this game then try the original Cosmo Gravity, or maybe even the developer's other offerings at A10 games. Enjoy!