TIS-100 and Shenzen-io are actually a good introduction to the concepts behind assembly, even if they're on a toy platform. I had done a lot of python and ruby

TIS-100 and Shenzen-io are actually a good introduction to the concepts behind assembly, even if they're on a toy platform. I had done a lot of python and ruby programming, but I didn't know what a register was or an op code, etc, until I played around with those games. It also was the first time I understood what a pointer is and "low level" programming in general, and gave me enough of a knowledge base to get a grasp on Rust and start learning it.