Battle-Game.com is a 2D Jump & Run with the map editor!
All Maps can be seen on the website
It was first released 2015/09/19 on Android and iOS – a few weeks later a stable facebook webgl release followed.
Now, 2017/05/19, atleast 7 new Versions were send to the store.
Not only Asyncron Crossplattform Multiplayer is possible (since beginning), actually there is a live multiplayer now. Each player sees himself on the first lane, every other player has a lane in the background – actually like planned atleast 5 years ago – but with a maximum of 4 players … instead of … hundreds, like I would like to have ;)