Another Runner - multiplayer Thread

Hi !
Kind of new to game development but Im working on a typical runner game powered by the libgdx engine.
It has both singel player and multiplayer mode. where u race other players all over the world.
The game is under development and is kind of a learn by doing project. Unfortunately i got to few test pilots so ill be more than happy for input and ideas to implement.

Since i have poor graphic skills ,the game today is based on various resources.

Link to Google play : Play.google.com

Hey hey. Just gave it a try - it's obvious that there is still a lot to polish - also physics wise.

However, I am curious about the multiplayer. How did you implement it? Did you use anything in addition to libgdx (some specific cloud service?)? Is it a realtime multiplayer or using recorded replays of other playthroughs?

Greetings, Gerhard