Thank you!
You might be able to find settings to change that inside ~/.lexaloffle/pico-8/config.txt (for linux, though I'm not 100% sure if this is were the config file is). probably try setting the "fullscreen_method" to 0.
Also thank you for telling me about the "exit to title" button, though I have no idea why it's not working (works in all non-executable versions). BUT I was able to get an odd fix for it that will be included in a future update.