Great game.
Really liked the art and overall style. Cool approach to a runner though would not call it a forever runner as it will end one way or another(either at the dragon or an enemy). I did run into an issue when dying to an enemy there did not seem to be a fail state, it just waited there after my health went to zero. Similar for beating the dragon. Would be great to add a button to send you back to the main menu.
Code was very readable and well standardized. Really liked the coding conventions doc, will have to do that for my projects in the future.