Then throw out all the unnecessary laser blasting. Use the parts provided to build many different droids. Arms, heads, batteries, hands, and bodies come together with legs and tracks for an absolute automaton. Use the specs on the left side of the control panel to check out a droid and see what tasks it will perform best.
Some heads can communticate better, some arms can lift more, and some hands can grasp odd objects.
The most efficient droids will be able to perform almost any task with only a small amount of power. Be sure to pay close attention to the mission briefing, because it will describe what is necessary for a 'bot to pass the test. The demo includes only the first mission, and this is unfortunate because it is an extremely large file that will probably take the whole night to download. Luckily, droids will have plenty of play investigating the caves. The robot must explore the entire level to find gears that it will need to fix the broken bridge.