Merry Rizzmas is an all around decent showing for Koopazu and co's Christmas megacollab. It's nice to see a level like this that doesn't take itself too seriously, as there's a lot of freedom for each individual part to show a given creator's flair and style in how they end funny elements with ones more traditionally seen in Christmas-themed media. I do appreciate the fact that every part has a strong Christmas aesthetic first and foremost, with nearly all of them sharing things like snowfall, Christmas trees and lights, and other jolly decor as a main visual focal point. This results in an impressive amount of cohesion considering how different the styles are of many of the involved creators; for example, the way Koopazu's bright, rainbow art/design hybrid still manages to mesh well enough with Ducknorriss' following more traditional, simple dark blue/brown designs due to their strong theming.

The gameplay is also solid, well synced and telegraphed while being open enough for plenty of thematic elements to be incorporated unobtrusively, namely the snowflake structures at around 0:14 and the present blocks at 0:40. The level feels good to play and the visuals don't interfere too much while still being nice to look at. However, I feel like this level's main downfall is indeed that there's no depth to the theming beyond Christmas and sigma humour, the latter adding effectively nothing to either main element. Each creator's execution of the theme feels quite different, there isn't really an overarching colour palette, structuring style or specific visual quirk to tie each part together aside from vague Christmas accessories, leaving the level feeling shallow and very much more akin to a joke level. This holds Merry Rizzmas back from a recommendation higher than a feature from me, but overall this is still a decent level.