This is a really cool idea and I liked the game very much. Very tricky puzzles to solve. In a next version I would focus on improving the graphics, because the overall game play is very cool! Maybe also the music could use some improvements, as it was a bit repetitive. Maybe it would make sense, to introduce the rules directly within the levels, one after another. You can do this just by adding a short text, e.g. "Place the frog on the blue net to become activated". The main reason for this suggestion is that most people (especially not in a game jam) will read rules. On the other hand the game itself is not so complicated, so most people might figure it out on their own.
Congratulations to this very cool puzzle game. I hope you continue to work on this after the game jam!