Is there already a discord server for this game? If not, can one be created?

I actually looked at other chambers and you can get OOB in all of them with cubes.

Since this game was made in Unreal Engine 4, if you hit ~ on your keyboard you can bring up the console. This allows you to do some commands, such as "slomo," which allows you to slow down the game. While it will probably not be allowed for speedrunning, slowing the game down [slomo 0.<number>] makes you get bigger cube jumps (since the game is running at a slower speed with the same framerate). Lower framerates, or speeding up the game makes the cube bounce much more. I have not yet found if it is possible to make savestates, however.

¤¤¤I managed to get the cube past the barrier, meaning the whole sector can be skipped! I simply did a cube jump on the left wall [when you enter] and found the cube on the other side. It is likely, however, this would not save much time, if any.

While I am not great at the glitch, I have a basic understanding. Place it against the wall flat, and then walk up to it until you are pushing it into the wall. Stop walking, and then flick your mouse left or right. If it does not work, place it down again and retry.

While messing around, I found it is possible to get OOB with the cube jump in the extra challenges (I assume it works for all). Here is a video of it:

I think it may be possible to skip massive parts of chapters, since some ceilings do not have collision.