Yadrin Framework is a very special engine made for use in the SE+ series of games, all of which are made on Scratch. It's going to be a direct 1-1 port of the Classic Sonic Physhics (by Lapperdev) guide onto Scratch, unlike Retro Sonic Engine, which is loosely based on it.
It's named after the japanese name of Spikes, a badnik in Sonic 1.
I'll be uploading a log every week until SAGE 2024, when a demo of S2E+ using Yadrin Engine will be published.
If you have any questions, please leave them in comments. 
Cya!
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