You weren’t the only person who struggled with the tutorial and I agree it could have been more clear and concise. Being unable to move the frogs was something I also found annoying during playtesting but didn’t have time to implement versus other polish sadly.
I originally had some enemies that used the mechanics more deeply but then became worried the game would be too difficult and frustrating to play so I scaled it back. If there had been time to implement another level it definitely would have made the mechanics more interesting.
The debris clearing is a weak point of the game and feels pointless. It felt better when I first implemented it but then realized getting to the end but losing because the debris wasn’t gone was pretty lame so I implemented the automated clearing. Sadly this essentially undoes the whole mechanic and due to a lack of balancing feedback I erred on the side of caution making it more easy in that regard (I originally had it so that you only had a bandwidth of two extra towers before you ran out of money for clearing debris but that felt so bad and just turned the game in to a boring math problem). A different method of putting pressure on the player or something else for them to do would have been a good idea! Thanks for playing!