Fun fact: more than 20 years ago this game would on launch show you a screen saying (more or less) "Yay, my game still works in [year]?! Enjoy the oldies!"

Thanks for your generosity! ✿◕ ‿ ◕✿

The key that you sent me was from this other game with the same name: http://steamcommunity.com/app/331660, which was removed from the steam store.