The Fifth Competition of Etherspace just started,(http://etherplay.io/game/etherspace)

 You need to have ether(ethereum cryptocurrency) in order to play in our platform Etherplay.  

About Ethereum here:

Ethereum The World Computer:

https://ethereum.org 

https://reddit.com/r/ethereum

About Etherplay:

Our goal is to bring back the playful and exciting feeling of arcade  game competition on the web. By using Ethereum, we have created a  transparent platform with which  our player can be assured that the  highscores are based on skills. 

Twitter: https://twitter.com/etherplay

Subreddit: https://www.reddit.com/r/Etherplay/