This is an older game, written in Lua with the Corona game engine. This project uses a tool called Spriteloq/Animo, used to consolidate the art; the tool no longer exists because it was sold to a company that is no longer in business. Thankfully, I had a backup within the project's depot.
At last, Gassy Goat has been released - a game that had been finished for a long time, now available for download on Google Play. I will submit it to the Apple App Store in a week if there are no major issues.
...I'm glad to be near the end of list of tasks. Only Pizza Bot remains. There are some older apps that I considered revising, but I have determined it would not be worth the time.