or uhhh is it just uhhh online plauyherh and not multiplauyherh
It doesn't have local coop because it is not possible to zoom out the camera (like in Spelunky HD) due to pixelart, but you can open an extra window(s) of the game alongside, "host direct" on one of them, and "join direct" (with default IP-port) on the other(s). Then each window will follow their own player, kind of like ad-hoc split screen.