Pretty solid TD with unit merging mechanics. I liked that every level was not just a different look and layout around the central town, but something new and unique. Keeps you from getting bored.
I ran into a small bug though. When enemies broke through to my town, I could not place a unit near it to defend it. There were too many of them, and the placement was being blocked. Also had an issue with fullscreen. The game stayed the exact same size.
But overall, the game is absolutely excellent! Well done! ❤️