Would working on it bring you joy? Because the world could certainly use more of that :D I personally lean on people to help stay motivated. For your example,

Would working on it bring you joy? Because the world could certainly use more of that :D I personally lean on people to help stay motivated. For your example, I would find a game dev meet up or some discord community, talk shop & share what I'm working on on a regular basis. Validate or give feedback on the work of others, and get some of my own. It's a process of constantly pushing back the thoughts and community makes it easier