Really great demo! As an avid TD genre fan, this game was a blast to play. The variety of towers and their connections between each other really made the field become more dynamic with each tower placed, and it was interesting figuring out how to do the typical strategic bottlenecks that are so common in TD games when enemies can actually climb your towers!
To be honest, I have not completed the demo campaign, since the last level is quite brutal, but of what I have played, I loved! Thank you for making this game and all the best to you in your future development of it!
For anyone interested in a similar premise of a TD game where you build up your towers vertically (though done in 2D and a bit differently), highly recommend Giants and Dwarves!