Disappointing Last Level:
- The Disc One Final Dungeon lacks the life and flora that gave life to the previous areas, and features three sections in which you jump from platform to platform in low gravity to find a key to the portal in the central area, and then backtrack through the section back to the central area, which is made harder on the way back with the addition of glitch blocks which have the same effect on your character as the game's regular Spikes Of Doom. In addition, 6 of the game's 31 secret houses required for 100% Completion are gradually Lost Forever in this area as you obtain these three keys since the hidden entrances to the rooms they're found in are permanently blocked off by said glitch blocks.
- The Very Definitely Final Dungeon features various glitchy jelly physics not encountered in the game's other areas, with some rooms practically requiring sheer luck with these glitchy physics to get through. While The Floor is Jelly itself was a well received game, most reviewers bashed this last level for this reason. In fact, if you find the game's very last secret area after the jelly physics have frozen but before the very last screen, you'll find what appears to be an apology from the developer written in platforms.
I'm so sorry for this level it is a cruel and terrible shenanigan...