Basic tips for 3D Game development

Hello. trying to develop a 3D game demo with Replit, and wondering what are the best practices:

1- What are the limits to build with Replit, is it possible to have a fully functional 3D game, or at which point is it recommended to switch to Unity etc.

2- How to easily create the gaming environment with positions on the screen? I was able to place the floor, characters, some objects, but are there best practices for the basic environment like the sky, weather, other animated objects? (this is something I am really struggling with)

3- What are the best practices to extract information from Replit code in order to forward to game developers? (like the code, game documentation..) I managed to do it once it gave me a html file but nice to hear more from professionals.

Thank you!

I know have a functional game demo with 3 levels and these 3 points above would really guide me for the next steps, thanks

One of the best basic tips for 3D game development is to study how successful games keep players engaged through clear mechanics, strong visuals, and easy to understand systems, even when the core idea is simple. A good way to get that perspective is by looking at platforms that categorize and explain different game styles, like https://casinospacebe.com/casino-spelletjes/ which shows how various game formats rely on clean design, smooth feedback, and instant player understanding. This kind of structure is very relevant for beginners because it highlights how important balance, pacing, and visual clarity are in any interactive experience. You can apply the same thinking to 3D games by focusing on readable environments, responsive controls, and mechanics that feel good within seconds. Start small, polish what you have, and let the player experience guide your decisions rather than overloading the project with features too early.