These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
That One Boss: The ice level boss is significantly more frustrating than others, moving erratically making its weak point hard to hit, and spamming ice crystals that block your shots and expand when you hit them.