Yep, just discovered https://hwkeyser.itch.io/one-engine-left, which just like our own https://visknut.itch.io/5-rights-make-a-right restricts the player to only one rotational direction. They went a completely different direction and ended up making a 3D precision landing game. We stayed 2D and went on to create a top-down racing game. I'm really curious if anybody else made something similar- I thought this theme would be much more common than for example the 1D one.