Left and right. Down and Up to move between levels. Space while on a ground button to press it. Top level does have a use besides the death button. See what doesn't happen at the bottom level. Button colors and what they are ([button color,] [cost color], [what it does]: Green, Red, Buy an Upgrader Orange, blue, improve drop cooldown Purple, yellow, Make a new dropper. Red, no cost, pressing it has a chance of causing death for the robot.
Warning: the game gets annoyed at you for dying. Reload the page when you die too many times >:) It's short so I guess the only reason to play for a while is to get the record. The money you spent comes back to haunt you. Every 30 seconds, 30% of that is deducted from your current money. If you go into debt, you die.
