I really enjoyed the game. But first time I played it I died at 700m and thought that it will go endlessly like that and there's nothing more to see in this game, but then I saw other comments where people were talking about the boss, so played again and saw that there's a lot more stuff in this game. So I think something like "Next goal: xxxxx meters" would be really helpfull. It would indicate that there's something more to see and it would keep player interested. Also a lot of times I got lost offscreen, so an indicator (like an arrow or something) where you are would be really helpfull. Other than that it's a really good game