You have to go to system settings then to Mouse Settings, then to "Additional Mouse Settings" then to "Pointers" (assuming you are using a Windows 11. Chromebooks, you can't. Macbooks idk how)
"If the game crashes when you load your save, make sure there is no empty space at the start of the file! The save file's numbers MUST be the very first thing in the file, otherwise Terra doesn't know where they are." (copied directly from the website)