I'm worked again a bit on the game and it comes with some sweet new features. 

Tha biggest change is, how I finally finished the new Quest system. The game always shows you the next goal, and writes it on the top left corner of the screen.

It's also handles countable goals and subtasks too. Like if the main task is to repair something, then you should have subtasks like collect 10 screws, after that go and fix the stuff, and at the end turn it on.

Also I finally connected the cave and the surface scene with elevators, but as you can see in the video, you cant use it for elevating boxes. It's still kinda bugz :D