OMG!!! This game is so good. I have been itching for a Orcs Must Die style TD and "Spire Must Die" is such a great concept. So far the only thing I've seen as a real issue is more a balance pass thing. Getting fliers on the first wave can prove very dangerous, especially on early floors. I have gotten fliers as my first wave on my first map in a run and they just all made it through because my opening hand had no spike walls in it, so nothing could hit them. Flying enemies should really be relegated to at least wave 3+ from what I have seen.
Thanks for the advice and the kind words! Sorry for the balance problem, it's just our first demo, we will definitely will work on the balance both trap and enemy in the later version! We love the concept too but it is the first time for us too, so we are trying our best working on a good plaing experience. Thanks again for liking our game!