TIS and Shenzen superficially look like assembly programming, but in reality they're very sophisticated puzzle games. You basically create these networks of ro

TIS and Shenzen superficially look like assembly programming, but in reality they're very sophisticated puzzle games. You basically create these networks of routines, each of which is limited to something like 9 lines of code (and labels cost a line!). All the tasks are structured so that when you try to code them the straightforward way you're always short a line or two, and then you have to sit there racking your brain to figure out the 'trick'. Then you incorporate that new knowledge in your solution for the next level, and so on. So it's really nothing like real coding. Highly recommended though! Especially Shenzen.