I did assembly on 6502, 6809 family, and 68000 for quite a few years. While I did enjoy Tis-100 and other zachtronics titles, those are actually quite a bit more challenging than real assembly programming. In real assembly you’re pretty much never limited to like 1 or 2 bytes of ram to work with. Zachtronics games are more like puzzle games than a real taste of assembly. For a real taste of assembly, write a little game in real assembly, or maybe calculate Fibonacci numbers in 6809 assembly, or maybe play with Chip-8.