I platform game is very strange, Maybe you're not taking your game seriously, even though it's a fangame, you could polish your game more:
Have you ever heard of game juice? Study about game juice on the internet, and yes. Give your game a purpose, for example:
Objective that the character needs to face or achieve. I understand that you may be a child of about 10/12 years, But if your dream is to be the best at what you do, dedicate yourself to it every day