BUGS
Placing a machine directly infront of any output, breaks the output permanently.
Belts/machines can be placed on walls or stacked by sliding the cursor from a valid placement tile to an invalid tile, and clicking within one frame(1/60sec).
Thanks for letting me know about these, I'm surprised I never found the first one on here, but I guess I just never tried putting a machine directly as an output. I got that one fixed.
Placing the machines in invalid places is probably a bit too much of a "I am trying to break the game" type, so I'll just keep it in ;)