I think I first played this game about 3 years ago now, right around when it released. It's held up really well. Devs, I know you guys decided to put this game on hiatus. I'm not gonna be a jerk and say you should prioritize it. Just that I'm excited for whatever you decide to do.
Extremely helpful tip: the enemies will break the dragon egg the first time they attack, for free, and the dragon doesnt die. So, there is no reason to buy the first dragon upgrade.