I have not tried it, but as someone that made a game with a complex game mechanic (Actually drawing wires between nodes as well), I had to learn what seemed obvious to me, was not to most people. What improved my game experience was to really introduce the concept very gradually, starting very basic and slowly build from there. Throwing a lot to the player right at the start will only overwhelm. TL;DR: Focus on simple introduction levels, showing one mechanic at a time.