It is a bit strange to be placing on the page the illustrations of the Tier as content of the site, but the truth is that they have been nice to me and I think it is nice that they can keep them if they wish.
I drew them thinking about what would look nice with the theme of the site. Personally I think that visually there is not much difference in the overflow between level-A and level-B, but I still think this reflects the subtle difference between the two levels as well. The S-level, on the other hand, is quite different and has a larger volume, which reflects well the jump between the previous levels.
Anyway, I wanted to be able to talk to someone about this.
Ah, I take this opportunity to also add some sketches and a couple of animated gifs. I hope you find the images nice.