Thank you so much! Glad you enjoyed the game and makes me really happy you played all 60 levels!
I think both nitpicks are valid.
- For the advancement I think I should pick a strategy and stick to it, just unsure which one is more intuitive or better. I gave the game to playtest to a few close people and got conflicting opinions here, and decided to add both suggestions, which I can see now hurt the experience :D
- I tried to make every mechanic as intuitive as possible, and actually hoped the game would teach them in a clear way, but I can see how this mechanic can be hard to understand. I think maybe having a simple level with one number off bellow and another on above could teach this mechanic, so that it’s in the back of mind for more difficult levels.
Thank you again for the nice words!