The environment is entirely based on the Modular Lost Ruins Kit from the UE marketplace. Regarding gameplay, the trees can only be planted in 4 specific locations. Pressing Tab will reveal the distance to those 4 locations. You have to watch out for your oxygen level (cyan bar) inside the mist. You can eject out of the mist to safety by pressing R, assuming you have enough fuel (orange bar). Thanks for giving it a shot! A tutorial will definitely be higher up on my priority list next time.