Yea, adding obstacles and more clear paths may be better than just grid squares (cricles).. basically levels should have a pre-determined way to solve, like pressing up left up right down will complete a level, and not much else will. That is how it will feel "solved" and you get that "ahh now i get it" feeling.
It's a great mechanic it's just finding out how to utilize it best is hard! You should do something with it after the jam for sure!