To play, you watch the game via an overhead webcam view and hit the PC keys for left, right and fire. Before playing for real, Raynsford said that "because of the genuine risk of fire with this project I completed a test burn before the main event." During those tests, he found that the paper invaders were too close together, meaning a hit on the intended target could cause others to burn up as well. After some tweaks, he said "the game played well and resulted in flamey death for the Space Invaders and not the laser cutter, (so) I consider that to be a win condition."