how do you start coop?im trying to with my brother but its not doing anything
You can play coop right from the start.
The controls are written on the website, but here they are again:
Player One:
[W][A][S][D] : move
[Space] : jump
[E] : interact
Player Two:
[🠔][🠖][ 🠕 ][ 🠗 ] : move
[J] : jump
[I] : interact
Gamepad controls:
[Analog stick] : move
[A] : jump
[X] : interact
Have fun!