I recently released a cozy little maze exploration experience made in Godot - check it out on itch.io 
In short: A procedurally generated maze with 3 different biomes and various points of interest. It’s more of a chill experience than a game - there’s no winning or losing, no point system, no goal other than exploring.
Graphics and sound by other people (links are on the itch.io page) - for me, this was purely a programming exercise.