Build your contraption using metal rods, electric motors, bearings, wheels, wings, and rocket boosters.
Assign inputs to control the different parts; you are good to go!
Make sure you don't destroy your contraption or do destroy it. Every part can come off if hit hard enough.
You can get the demo here.
NOTE: The game requires a mid-high range CPU at this stage because it's not yet well optimized, but trying it won't hurt.