Initially I didn't see the HowToPlay Text File in the download folder and thought their were no instructions included. In the game the jump input didn't always work and after tripping on the rocks twice the player would phase through the rocks and coins. Overall I liked the scrolling background and the concept for the endless runner style you had!
I'm not goint to deduct any "brownie points" but you should show your controls and a how to play somewhere in your game as readme's are still great but not everyone will see them as its something more left in the past. You could add controls to the game page to counteract this as the game page would be perfect to display any relevent infomation about the game.