You only get one boomerang, if you don't catch it when it returns or it hits an obstacle you will need to retrieve it before you can throw it again.

The controls are WASD/arrow keys for walking, mouse for aiming and left click for throwing.

I originally wanted much larger and more interesting levels along with better art but I'm happy with getting the boomerang mechanic working, even though the boomerang moves in an unrealistic straight line!