1.50 GUI mis mod

Marble Blast Platinum 1.50's GUI style coded into a level. 
GUI taken from 1.7.42, hooked up to work with modern day PlatinumQuest. There are a few slight visual differences to accommodate for new and removed features.

Download
Installation: Extract the zip to your PlatinumQuest directory. Then, load up the level in the "Custom" level category.

What

You heard him 💪

This is great! I'm really intrigued about how you've managed to make this as a level, and not just as a texture pack. Is it necessary to make it this way? How did you figure it out? Does it work on the leaderboards? I hope it doesn't cause bugs like a lot of other levels with custom code have done in the past.

Would you possibly be able to make a version of this for 1.20 too, or is there not enough demand for that? I ask purely out of nostalgia for the first version I ever played. The Metropolis menu music really takes me back.