Space zombies Building Pixel (Ufloor)

Last main component, it is the least decorated (for geometric reasons) but with interesting functionalities. The Ufloor is meant to create a basic roof to any cube without the need of a second one stacked on top, or close the access to one of its other opened lateral faces or stack Cubes upside down. If you go for a fully cubic and symetric building it will also allow you to create a intermediary floor, while keeping the potential internal Discs plugged around locked in place vertically, preventing them from moving inward unexpectedly and knocking off your models. (remember to set in place after any internal Disc).

If you already got a Cube, and a Disc, then print one, its use will become clear once it's in your hands.

The Cube