Hello,

I'm considering making a top-down 2d space RPG game called The Belt. More info on the project's Itch page: https://rokasp.itch.io/the-belt.

Currently the game is in idea stage. I have created a game design document and a poster where I set out the most important aspects of the game. I also have a very basic prototype with placeholder graphics. However, it is very basic, with moving and shooting basically, something that all games have.

I'm planning to spend several months to build something like a decent demo to at least illustrate the feel of the game but before that I thought I should really check if my game concept can expect to find an audience.

no please its not how you're supposed to make a game look at those videos https://www.youtube.com/watch?v=kMDe7_YwVKI 

https://www.youtube.com/watch?v=z06QR-tz1_o&list=PLhyKYa0YJ_5C6QC36h5eApOyXtx98ehGi, you should make a small prototype first to see if your game works instead of a big GDD, it will just makes you lose a lot of time, and you can't know if your game is fun to play based on an idea and the opinions of peoples about it (i did tens of game prototypes and the one that hurt my mental the most were the ones i spent months on to finally see it wasnt fun to play )