itch.io

This sounds like a file permissions issue. I haven't done a whole ton with chromebooks, but you probably want to get linux running, here's a guide from google. https://support.google.com/chromebook/answer/9145439?hl=en Next you want to change the file permissions so that the file is executable. You do this by typing the command "chmod +x /path/to/your/file" in a terminal. You should be able to run the file by just typing in the file path and hitting enter. Best of luck and have fun!