Hey Slam,
On PC, you can download here on the website itself, unzip and run (saves carry over automatically).
You can also get the latest version through the Itch app, and its the same process of downloading and running.
On Android, we have a step by step installation guide here:
(When updating on Android, you put the new .rpa file into the "game" folder and delete the old .rpa before booting up).
Hope this helps!