You have to win the race by going as fast as you can!
Pump up your adrenaline by driving your motor bike through the winding levels in this awesome game. Here my objective is to Collect all the green tags and go fast to exit point. Walk through the wall to go upside and do not let crash your bicycle. Avoid colliding with walls on your head. Guide your dirt bike around various tracks collecting green adrenaline balls. Challenge the clock to win new bikes and set your best record on score board! Use the UP/down arrow to move, and the left and right arrows to balance the bicycle. Use Space to change direction.
Drive around trying to do jumps on the half-pipe until you get bored.
BTD4 features improved graphics, loads of new and original tower types and tons of upgrades for each tower type. Heaps of tracks, save games, career mode, sandbox mode and apopalypse mode. Bloons Tower Defense 4 will give you almost unlimited replay value.