Really good visuals and cool idea. I think it would have been more challanging if you made several levels and no random generation. In the current state it is kin of just luck, if you get a good start or not. I managed to get a score of 1800 after 5 trys and after that it was impossible to get more.
Overall a really good idea! Please keep working on this a week or two and try to add music and sound, and make levels. Then the game would be amazing!