Fun idea, but controls were a bit difficult, also there was no retry option and every time I had to get out the level and get back in, which can be a bit of a pain if I have to still learn how to play
It's just RMB, and it removes pieces (both machines and belts) as you drag. So you can with a few swipes clear the whole board usually. But yeah, a dedicated reset button would be handy, and also not hard to do