sadly this went overtime. I used total of 3.5h, because of too relaxed planning I went ½h overtime. I wanted to make some clicker game, but I should have focused writing better utility. In the end, I had pretty good structure, but only half of the code was using it.
I also thought pretty long on the concept and design docs (easily over 12h, though I had some other concepts which I scrapped). Mostly I did planning until last moment when I had to start working on this. Then wrote some stuff, and paused and continued.