It was actually level 7 (I think) that stumped me. But when I replayed it I realized I had seen the kind of configuration before. Not sure why it didn't stick 🤔
But yeah, more levels to help the player really grasp the rules would help I think!
I see, thanks for the clarification! You're right that the rules need a bit more explanation in the game, the difficulty curve is a bit steep at the moment. It's definitely a difficult part of designing games to me, but getting feedback is very helpful!