It turned out to be a pretty good tower defense. The mechanics are quite interesting. At first, I didn't understand how to buy houses until I realized I had to look at the shadow. Then I realized I had accumulated too much money and had already bought everything. What should I do with it? It would be cool if the houses could be upgraded. I checked, and it turns out they can be upgraded.
I’d like to see the purchase area marker increased and some kind of visual indicator showing that a house can be improved. Other than that, everything is great.