Ok, it clear that I won't make it for the 5PM deadline today. Just to make it clear, I was working on the project to be released on WebGL/HTML5 (which is also one of the reason why I hit my head against a wall many times because I'm not really fond of GDScript in Godot 4 compared to C#.)
Long story short, everything was fine... until I started dabbling into the deeper stuff.
First, the project was named "HELLO-NEW-WORLD" which is a mix of of a play of words with the "Hello World!" program and the fact that the player's role is to control a remotely-controlled machine (a ROVER) on a unknown world. The player's whole "connection" with the planet is through the ROVER feedback.
For example: Main Menu and settings :


Works 100% fine! Musics & Sounds works great!
For the music, I have soundtracks from a group that I have purchased licenses from that sounds like a simplified version of the Interstellar (one of my favorite movies of all time) movie's soundtrack.
The story... all done! Simple story where the player is introduced to the game's settings via message (like below) and has a tiny bit of humor.

And this is where things crumbled down HARD.

Long story short, the menu is divided into 3 lanes.
Lane 1 (left) is where you select parts of the rover you want to change.
Lane 2 (middle) is where you select either a permanent upgrade or a part to insert in one of the available slots of the rover.
Lane 3 (Right) is where you see the result of the selected part as well as a (kinda) preview of what the part (or upgrade) looks like.
The game has 8 primary stats and 3 secondary stats.
The game loop works fine, but I couldn't work on the implementation of the stats to affect the parts of that loop.
(Things were too fine for a while and I should have stick to a non-stats-based gameplay and instead expends on the gameplay loop.)
With all the work I have put in the that menu above, the main game (controlling the rover) is bare-bone and the environment is incomplete (which lacks in objectives and obstacles).
Even if I have failed to finish for the DevJam, I got to say that there's some really nice things in this so I'm not throwing it in the garbage. There's a crap ton of stuff that I would actually want to put into this game (with more time needed obviously). For example, I did a really quick job with the 3D models for the rover's instance. You don't see it on the screenshot above (it only show 2 parts), but I made 24 possible parts (all of those things in the middle that aren't permanent have their 3D part instance when installed). I didn't had time to put proper animation into it at all (like robot arms and lights & blinking things, etc.) I would also prefer if I could make the part adapt better to the ROVER's body (instead of being square like above). Thinks like actual links/wires/connections between the rover's parts and such.
Also, I would most likely burn that menu above and rebuild it from scratch (for a 4th time), but this time, I would put the menu in better "layers" with something like a separate tab for the upgrades, a proper dedicated ROVER customized menu and a pre-mission launch menu (which, right now, there's NONE! you press _LAUNCH and you're thrown on the planet immediatly)
Also, that Tutorial... well, I couldn't finish it because that freaking hellish menu above couldn't work properly due something I coded to avoid certain issues... which ended up creating their own issues (basically erasing the purchase and part installation, without refunding the funds wasted.)
I hope you had more success than me. :P