Here is my very simple cheap integrated desk case. I just had to cut the top of my desk to place a glass see through window. I use it mostly for basic computer tasks and little gaming. Never had any issues with heat so far.
Neat! I haven't seen a case with UV lighting for quite a while. I think I can see one exhaust fan beind the rear IO in the photos, and the PSU to the left of the GPU presumably also exhausts air. Is that all the ventialtion, or is there an intake fan too?