How do those inputs and outputs connect to next levels... Does each level need to pass every belt through it or can you skip one and still be able to retrieve an item on the next level? What if you have 100 belts output in previous level and 1 of them is low density structures, then how in the next level do you pick that 1 specific input belt is low density? Does it work with filters or some new UI? How big can the hazard concrete area be and are there limitations to its dimensions, such as can it be a rectangle or does it need to be square? Is this in constant creative mode so you get free stuff for building or you have to craft everything yourself, including the concrete? These things aren't clear from description and screenshots.

Each level must pass through to the next one using the special structures.
The special structures must be placed in the same position as the previous layer to pass through resources.
There are no extras on top of this.

The big challenge with this mod is that there is a limit to how many surfaces can be kept alive before FPS drops too much.