WASD to move (double tap W to sprint like in minecraft) Arrow keys to turn Space to jump P to pause and options. G to go to the center of the map M to draw the full map on the screen. You can't build or anything cool like that.
Scratch wiki for the basic 3D. Notes: the level of detail is less the farther something is with high render distance. If you don't want it to lag on any render distance besides the default, play on https://turbowarp.org/1205357784 This isn't really a game, It's just a random project I made mostly on the offline editor. I just might use it for something someday. The map is sort of stored in 2D as a heightmap instead of 3D. So no walls or overhangs. :( #3D