Me personally i always set up some things that you need universally no matter the game so that you can spend as much time on the idea and gameplay, for example i always build my entire UI before the jam and i also try to use as many resources or ideas from past games, I always have a 2nd godot window open to copy code from different scripts, i think its also pretty important to start from a simple idea thats easily manageable and then progressively add new things if u have the time and resources
Viewing post in What is your strategie to create games fast?
Which stuff would you said are good to setup before? My idea is to build a small SDK atm I try to bundle sound, language/labels, maybe controlls and settings. So your personal library did grow over time might be the same case for me as well
Do you shrink down your concept first so you only have a small one or do you always just have a simple idea to start with