Check out this WIP co-op game showcased by 2WheelerDev, in which two players control a wheel in a two-wheel construction.
The developer explained that the concept is cooperation, as there is no jump or turn, and each player can only spin their wheel forwards or backwards. That's quite a challenging mechanic – a real test of teamwork and coordination.
There's not much detail about the project yet, except that it's powered by the Godot engine.
Take a look at more of the interesting gameplay mechanics, such as the one shown in the demo by Game Developer normal_fridge, in which a character becomes more pixelated when losing, gravity grenades showcased by Tsitski, the developer of the upcoming FPS Partizan, and magnetic wheels, Jakob Wahlberg, the developer of a fast-paced roguelite Go Mecha Ball:
