AAAa i really wanted my 30k on the rank! I saw that you used C2 on it. Once I made a game on C2 with online ranking using firebase. Downloaded an API from a programmer (free one to use on everything, including comercial ones) and it was very usefull and easy to add it: https://c2rexplugins.weebly.com/map.html
OBS: i really liked your game!