as the other comments its a really fun base for a full game, its really nice with the phisics and the building, there is just one thing at the beggining you really cant find iron fast (apart from the starter crash site ofcourse), maby you could add a sprint thing so you can run around faster when you dont have a rocket. but overall its a really really great game.
you also could increase the iron spawnrates.
but its just such a nice game the building the gravity it just fits the style