Free
Furret:The Literal Walking Simulator
Free
Source code and assets
Source code requires GB studio, it can be downloaded at https://www.gbstudio.dev/
Furret:The Literal Walking Simulator is exactly what it says on the tin. it's a #literalwalkingsimulator for the Game Boy where you play as the Pokémon #Furret.
It even features full Game Boy Color support!