I was thinking if you can refund Pico 8 because I can't get it to work

Do you have the setup exe file?

i use a chromebook

are you using the Linux version?

yes

is developer mode active?

yes

@Puffupagain I found the issue. Follow the guide you were already using but run it using
./pico8
instead of
chmod +x pico8

it will start in fullscreen, but you can change that using the window key.

./pico8 is the way to run the program, it’s not instead of chmod +x: the chmod command is needed once to mark the file as runnable

thanks