> One (general-purpose) register! I'm currently making a hacking puzzle game prototype where you need to manipulate bits of memory to trick CPU into doing the

> One (general-purpose) register! I'm currently making a hacking puzzle game prototype where you need to manipulate bits of memory to trick CPU into doing the things you want. Having a single register makes it much easier to design puzzles and also solving them. It also makes the gameplay more straightforward.