I actually don't think the levels here are that big of a dip from the base game. Some of them are pretty great and I like the new mechanics introduced, especially when trying to get the fastest runs possible.

But the bossfight is a mess. It's too ambitious without the best part of this game: actually speed-running. The boss is broken up into three phases, and it resets your time after each phase, but it's all stuffed into one level. It would've made more sense to make it three separate levels and then allow users to speedrun them with leaderboards included. I was pretty surprised when I finished it and didn't have any time saved or leaderboards present, but I understand why that wouldn't be the case as it's broken as heck. The final phase doesn't reset properly, and the second phase is full of random deaths that I cannot explain. It was frustrating :(