It's a nice game, I like the overall concept. It could be made damn addictive and enjoyable, if there was a way, I could loose; maybe If I press the wrong key for 3 or 5 times or maybe if I hit an obstacle or something like that. Also I felt, there is a need to add more fun elements to the game and improve a little on the art--especially the land-- the charcter, though looks great. I didn't understand why those yellow circles were there, Initially I thought they were points I had to collect, but if so, there is no animation nor any highscore system, so that should be clear.
I truly appreciate your efforts. Nice work!!!