Your website says,
For every player you kill you will earn 1 Satoshi.
If you finish the game in rank 1-5 you will earn a bonus prize up to 100 Satoshis
Are you serious?? I understand that you are not charging any entry fee and earning only from advertisements. But having a little entry fee and sharing it among the winners will make the winnings more attractive and possibly attract more players!
It is probably a system based on receiving and distributing its revenues through advertisements. Such systems are becoming more and more difficult under current conditions. And payments are starting to fail.
EDIT: I've just tried to playing. But there is no one in here

Actually, it is so simple game and I can't see any ads in it. It seems not cool.