Adrenaline Challenge - Watch out ? don?t crash into the wall! The objective in Adrenaline Challenge is to drive your two- Watch your speed, be careful of that jump! Adrenaline Challenge really gets your adrenaline up trying to get through these courses on your two-wheeler. You have different courses that you try to get through without crashing into a wall or falling off your bike. Use the arrow keys for speed and tilt, and use the space bar to change your direction and go another way ? there are some surprises when you change your ways. Adrenaline Challenge is really fun ? go as fast as you possible can - just don?t crash and burn!