It's at least functional. Not a bad infinirunner. A bit more polish, and it'd be a welcome addition on a mobile shop.
I think maybe a changing in position of the score and high score would benefit the game quite a bit, and so would maybe changing the font.
Overall, well-made product, but a user interface overhaul would greatly benefit this game. So would missions, to incentivise more play and better play.
Edit: There's also a point where everything gets crowded and it becomes impossible to advance. Make the difficulty increase maybe gradual and try to guarantee some way of escape.