Problema de límite de gas MetaMask en Ropsten

Cuando trato de crear mi contrato en remix usando metamask (web3/Ropsten inyectado) configuro el límite de gas en 4700000 en remix y presiono Crear. Cuando se abre MetaMask, me pide que baje mi tarifa de gas por debajo de cierta cantidad. Una vez que lo bajo (si no lo hago, no puedo crearlo), el contrato se crea PERO mis variables dentro del contrato no se inicializan. Por ejemplo una var a = 10; está devolviendo 0.

¿Cómo puedo superar este problema?

pragma solidity ^0.4.20;
import "./oraclize.sol";

contract Casino is usingOraclize {
   address owner;
   uint public betAmount = 30 finney; //Equal to 0.01 Ether
   uint public totalBet; //Amount of Ether bet for current game
   uint public numberOfBets; //Total number of current bets
   //uint public maxAmountOfBets = 1 //Maximum amount of bets can be made for each game by each user
   uint public limitAmountOfBets = 3; //Maximum amount of bets for each game
   uint public numberWinner; //Number that won last game
   address[] public players; //Players
   mapping(uint => address[]) numberBetPlayers; //Who bet for which number
   mapping(address => uint) playerBetsNumber; //Number bet by each player

   modifier onEndGame() {
       if(numberOfBets >= limitAmountOfBets) _;
   }

   //constructor - set bet amount and max bets in each game
   function Casino(uint _betAmount, uint _limitAmountOfBets) {
       owner = msg.sender; //set creator of contract to owner

       if(_betAmount > 0) betAmount = _betAmount;
       if(_limitAmountOfBets > 0) limitAmountOfBets = _limitAmountOfBets;

       oraclize_setProof(proofType_Ledger); //arge
   }

   //check if player exists in current game
   function checkPlayerExists(address player) public returns(bool) {
       if(playerBetsNumber[player] > 0) return true;
       else return false;
   }

   //bet function
   function bet(uint numberToBet) payable {
       require(numberOfBets <= limitAmountOfBets); //check if limit has been reached
       require(!checkPlayerExists(msg.sender)); //check that player hasn't bet before
       require(numberToBet >=1 && numberToBet <= 10); //check that the bet is between 1 and 10
       require(msg.value == betAmount); //check that ether send by sender is equal to bet amount

       playerBetsNumber[msg.sender] = numberToBet;
       numberBetPlayers[numberToBet].push(msg.sender);

       numberOfBets += 1;
       totalBet += msg.value;

       if(numberOfBets >= limitAmountOfBets) generateNumberWinner();
   }

   //generate random numbers using oraclize_newRandomDSQuery function
   function generateNumberWinner() payable onEndGame {
       uint numberRandomBytes = 4;
       uint delay = 0;
       uint callbackGas = 200000;

       bytes32 queryId = oraclize_newRandomDSQuery(delay, numberRandomBytes, callbackGas);
   }

   function __calback(bytes32 _queryId, string _result, bytes _proof) oraclize_randomDS_proofVerify(_queryId, _result, _proof) onEndGame {
       assert(msg.sender == oraclize_cbAddress());

       numberWinner = (uint(sha3(_result))%10+1);
       distributePrizes();
   }

   function distributePrizes() onEndGame {
       uint winnerEtherAmount = totalBet / numberBetPlayers[numberWinner].length; //how much each winner will get

       for(uint i = 0; i < numberBetPlayers[numberWinner].length; i++) { //sent ether to addresses
           numberBetPlayers[numberWinner][i].transfer(winnerEtherAmount);
       }

       for(uint j = 1; j <= 10; j++) {
           numberBetPlayers[j].length = 0;
       }

       totalBet = 0;
       numberOfBets = 0;
   }
}