Browser Based Game Creation

I need a Browser Based Game (Similar to Business Tycoon Online or Millionaire Legend) Needs to have/ be - Extremely Modified theme (should be very attractive) - Integrated chat module/ forum - Option for players to purchase in game items/upgrades - Option to code, for updates and new elements - Should be Easy to manage and user friendly - All applications and programmes MUST be compatible with mac - Option for payment via PAYPAL, credit/ debit card - Integrated security against hacking - Refer all the In game features from BTO online Please get in touch if more info needed & if possible look into web hosting and server costs. Experienced bids will be considered! Note: The game should be extremely Modified and should look better then the original one