It has nothing to do with gambling as it is just like a free game to earn small amount of satoshi so it should be moved to Micro Earning board unless there is a plan to make it like a real gambling where people are risking money to play against each others but I think it will be hard to make this game be provably fair.
Sorry to say but the earning of playing your game is too small, I believe free bitcoin hunters will prefer on claiming faucet instead of playing your game.