Hi,
if you bought the game in mobile (iOS/Android), send your receipt to support@choiceofgames.com to access the website version of the game here: User-Made Games Archive - Choice of Games LLC. You need to create an account (or sign in) in the choice of game website. Once you access the website version, go here for the thread on how to access it on the website version: How To See Other Games' Code (current info posted in OP and Post 146 on 6/18/19)
As for Steam purchases, you only need to link your account to the CoG website upon restore purchase.
Hope this helps.