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!
I checked out the game, and it looks simple but nice. In fact, I think these kinds of interactive games are what most gambling websites lack. It's nice to go over the map and search for ammo and players. It's an interesting sort of faucet if people get Satoshis for it. But I agree with avikz that it would be more interesting if there was a small fee to join the game, and then the money players paid to join would go to the winner of the game. 'Cause 1 Satoshi or even 100 Satoshis is nothing. You won't lose anything from it as a website, and if you believe in the free version, just make two modes of the game (one is what you already offer and another is where people pay the entry fees that go to the winner of each round). Good luck!