The graphics looked nice. I was actually surprised that the background image was static and not some form for parallax background. That would have given some nice depth to the game when moving around the world. I liked the large greek temple which is a perfect place for some form for boss battle. As you mentioned you cut that part out, but I can see the vision. Maybe have some form for highscore system as well and collectibles, that way you encourage the player to explore the world while simultaneously doing it at fast pace for more points.