I tried it but the game is kind of confusing cause it uses relays instead of transistors. I think it's more frustrating and would only discourage potential learners.

A better way to get a solid grasp on low-level hardware logic is to just build an eight-bit breadboard computer. Here's a tutorial: https://eater.net/8bit

I'm working on it now. I've only done the first module so far and I've already learned so much.