I'll admit, I first missed 'how to play' because it was so tiny in the bottom-left corner of the screen, so I was getting frustrated at the first hill I could not jump onto.
Anyway, the game looks nice, sounds, it plays fine. It hits all the right checkmarks for a solid entry, for sure. Nicely done.
Can I make the suggestion of adding "How to Play" to your main page as well? I know that is the first place I will look for game instructions.