I'm IN !
I was already in the theme before I started !
I woke up, fixed my computer (In short, my ubuntu is no more supported, I had an old haxe version, no more compatible with the 2 day old release of HaxeFlixel, I setup the new Haxe version but forgot to copy the STD libs, and a few cryptics errors after, I finally get over it).
So, I will use ESpir, an home made game dev framework based on HaxeFlixel (but with ECS to organize the game code).

I just choose my game theme : you have to provide logistic for an isolated scientific base. I'm very sad to not do a game with cars and parking spot taking ALL SPACE like in real life, but I was afraid it will be too complex to implement traffic simulation.