Disclaimer: I am the developer's brother.
I like the concept but the balance in most stages makes you able to just find a optimal solution and stick with it - which distracts from the main mechanic of connecting/disconnecting the towers and reduces the need for me to engage for the whole level. Some more time to develop so you could have introduced specific rock-paper-scissors type tower-enemy relationships and/or multiple lanes in each stage would have made this heaps more fun.