Here's an incredibly low-quality gif of the laser and repulsion beams, also showing the first draft of the player model. The plan at the moment is to animate it, have the mini-cubes shifting around all the time, and have them bunch together to jump etc.
This particular level draft—'Gate'—is intended to teach the player some uses of repulsion beams. The beam will prevent the player from climbing those stairs, as it shunts them along into the wall, so they must get death-blocks into the beam to fill that area. The player can do this by dying in the laser, then climbing over that corpse-block to die in the square containing both laser and repulsion beam a couple of times. This level was actually drafted a while ago, before we moved the player's start and exit locations, which is why there's water where the player should be spawning. It'll need updating!