Well I have 4 suggestions:
1. an opition to change the dragons color (maybe in some type of shop or smthn);
2. add more maps;
3. add stages of weight, an example would be like: "you got 100 coins? then your speed is decreased;"
4. a way to escape the guards and/or citizens to get the kobold, like making a burp or a belch, that could be also a way to distract citizens or guards in game.
I hope you add atleast some of these, welp see ya in a another time!