Almost a perfect platformer megacollab in my eyes. Parts were not made to be cohesive and were only loosely tied together into chapters by themes, which allowed creators to explore more unique themes and as a result create some of the most memorable platformer parts (some more, some less!), Enough about that though, my favourite part about DON is how flawlessly it pulls off the IWBTG fangame vibe it originally aimed for. There's an underlying ambient, lifeless atmosphere throughout its gigantic runtime, combined with incredibly diverse theming across parts as well as gimmicks - on top of how even small elements like the menu, credits, ending and practice interface all feeling like they could easily belong in a needle fangame. To me, the fact that they nailed this initial concept so perfectly is enough to outweigh any inconsistencies in quality (although personally I'd argue even the deco quality is a small issue) or cohesion. As a final remark, I really do wish this level did better performance-wise - although, it was an inevitable outcome considering the sheer volume of the level.