You can buy the game via the Google Play Store, but the current version is only a single player demo with a very small world map that can't be changed.
The plan is to port all the features from synSpace: Drone Runners, into Well of Souls: Rune Runners, at which point it becomes WoS-like in the ability to share worlds between players.
But in 3d, more or less (hard to tell with my programmer art).