Hard: Having 3 repair blocks repetitively repair a block that's taking 2 damage per round until it gets destroyed causes a variety of glitches.
The easiest way to replicate this is to have 3 repair blocks all adjacent to a gun that can backfire. The gun must be facing an open space. Then spawn an enemy fighter directly in front of it and spam space until the gun is destroyed. You can do a multitude of things from here:
- Press space, crashing the game along with some graphical bugs
- Destroy the fighter, then spawn and dock any block in the spot where you had the gun; causing the new block to move around by a factor of 2.