Completed the game, it was pretty simple. The last level made me think a little, but the solution was not hard. It's nice that you can skip text, but I'd also prefer if the simulation could be faster.
This game seems pretty popular. How did you get 100+ ratings?
Sidenote: I'm also working on a commercial coding game. If this kind of game interests you (or anyone else reading) and you'd like to playtest, let me know.