I asked ChatGPT, and was able to fix the error in Simplicity's platform mini-game. As for The Day After, I tried it on the editor and it worked fine. (For some reason, I can't enter the last location in Day After on my computer.)

Thanks to you I have been able to play some legacy maps (especially Holy Days and Exploit Collector). Thank you very much.
It seems that the platform mini-game at the end of Exploit Collector and at the end of Simplicity/The Day After Day1 are not working properly.
For Exploit, the last recorder does not unlocked.
As for the mini-game, the first color keeps showing up. However, the console shows the next color.

Would be nice to see this on the actual workshop tbh, maps seem to be as functional as their Legacy versions.