I'll echo Rinaldo's comment above. There's definitely a place for simple, fun, bite-sized holds like this. The restraint in only really using two elements is pretty impressive, but the thing I like even more about this hold is that it's short and sweet. Not every hold needs to be an ambitious 70 room epic, and it's nice to have some shorter holds you can play through in one sitting. Roaches and Walls does short-form architecture perfectly. There's no filler here, it's a delight to play through from start to finish. The difficulty is pretty light, but nothing is trivial and each room has an interesting idea or two behind it. This one is seriously worth checking out folks, go play it!
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