Collect as many bolts as you can in the time limit Enter the door by pressing the down arrow to pause the game and charge the robot, upgrade it's armor, or see your score. Charge the robot by pressing the charge button. If the robot runs out of battery, the game will end. The first upgrade costs 20 bolts, but the second costs 30. Upgrades do not take away bolts, but you need bolts to earn them. Once you upgrade, you can press space to shoot a laser. Space to use. In volcano mode and bomb mode, avoid the projectiles while collecting bolts. Does not work good on the internet due to glitchy variables.