If your interesting in calming down to replicate a build in blocks by using materials from the shop which is purchases using coins. You can play it also i think the aim is to not make currency go to 0. It is also a temporary or casual game that can be played. Also repititive and need more database of things to make.
(no game can be infinite.)
Your more like doing the proffesion of engineer. I also think the textures should be improved. Single Player is also quite blank.