Just a level solver: Why my simple puzzle game took me over a year to complete

I was gonna re-post this here, but I'm feeling lazy.  It's a better read on Gamasutra:
http://gamasutra.com/blogs/JonahWallerstein/20141028/228745/Just_a_level_solver_Why_my_simple_puzzle_game_took_me_over_a_year_to_complete.php