1) I used assets,I have already wrote there "Art and music is not made by me"(view game page)
2)I don't agree on that,I think the background should be simple and good.
3)there is mobile support,If u tried opening it with mobile u will see the controls
4)Again,Every game don't need to be 3D or 2.5D to look "awesome".
5)I thought of adding the leaderboard but it will be useless since it's a small game.
6)I don't think that we have to add something to "motivate the player to move forward" Sometimes,it's just simple gameplay that motivates the player