Thank you for the feedback!
The losing/winning rules were a bit tough to get but it's based on the idea that you get a set number of turns per level and you need to use that or fewer to complete it and continue to the next. Then, leftover turns can be used as extra in future levels as needed.
The difficulty increase from 1 to 2 is... well... luck. It's randomly generated levels each time you play through the game, and they can be anything from quite easy to seemingly impossible. I know the balance there is tough and I want to expand the generation to take into account more features of the levels to make it more balanced, but I was limited on time. If you replay through the game you may get some better luck!