Your mission is to defend the bi tower from the monsters invasion. Click on the green portals and pick the best defense. Plan a good strategy to kill the enemy and press Attack. Have fun!
Crush those mutants, aiming at them with the mouse and attacking them with the left button of it, while you avoid that they reach you, moving with the arrow keys... Change weapon with the numbers 1, 2 and 3. EXTEND THE SCREEN BY PRESSING THE LOUPE WITH THE SIGN +.
Help our friend to recover all the lost pieces in the time machine. You will have to fly over the city looking for them and avoiding the obstacles. Use the arrow keys to fly the spaceship.