rotten hill 1 is alright, i'd say by far the most offensive part of the pack is rotten hill 2, especially with that final checkpoint. the underwater section in particular absolutely kills nospins and it's hard to tell what the button does.
but haunted castle tho. first of all you nail the atmosphere with texturing and music (and music progression), but then you go above and beyond to adjust the music depending on the gravitational pull, and even put in a few things to trick the player. makes the 'haunted caslte' feel really vibe. in act 2 you start out by giving the player a problem they have to solve, and then later in the level BAM the same problem is there again in a different form and the player has to apply what they learned but wait there's actual punishment for missing it this time and it just feels mmm chef's kiss, we need more player learning like that. overall, 4 stars good spooky dance mod and oh yeah the level pack too i guess