I think the fact that the levels generate as you climb is neat, but please put something interesting in between levels, if I didn't interact with any entrance I would survive for like 20 minutes straight, so maybe enemies also in the stairs and a way to attack them would be more enjoyiable. Or even entire floors directly accessed through the stairs. Your architecture doesn't need to be realistic, it needs to be fun.

Interesting and refreshing seeing a 3D take on the 1bit theme given that 90% of the games are pixel art based.

Constructive criticism: 

Obstacles where well implemented: Food system and health. Enemies, while simple, populated the tower and added live to it.
Goal: There was none. The simplest way to add a goal to an infinite survival would track some variable to compare each run. The most basic would be time alive and amount of food collected.
Tech aspects: The only one I will mention which is above nit-pick level is the high contrast (understandable for 1bit style) together with the circular motion of the helicoidal movement of climbing the tower. After some minutes of playing it starts being hard to the eyes. Lowering the quantity of white lines, although making it more difficult to make out the differences of surfaces (which are wall and which floor), would make it easier to track the 3D POV.

Cheers!