Neat tower defense game! The idea of your resource for buying/upgrading your unit being the same as your health is a great way of naturally building in risk/reward. I found the difficulty a bit off as the early game is pretty difficult since you start with fairly low money and one dragon isn't enough to kill everything on its own. But then it gets very easy very quickly, before the steep ramp up at the end. So difficulty felt all over the place for most of the time. That said, I really enjoyed playing it and strategically placing/upgrading my units. So awesome job!