I Need Some Suggestions for Improving my Game Character

I’m making a game, but the game character, I feel, is not as good as it needs to be. The character is for a platformer game, so it doesn’t need to be too detailed with the modeling. I just need someone to tell me what I can improve on it. Here it is (rendered):

It’s just a base model, so it needs improving. Any suggestions appreciated.

It depends on the character concept you had in mind to tell if it can be better