Well, it's kinda fun and good base game to work on. It needs more purpose like score system, story telling, gimmick and I can press 'A' to go left for some reason. I believe that you use Input.GetKey(KeyCode.A) instead of Input.GetAxis("Horizontal"). I totally recommend you to check on that lesson. It's help a lot in your future project! Still a cool game maybe not without many gimmick or story but it's a good start! Keep it up!
also check out my game if you interested.