Congratulations to your idea and the domain name!

But before you get rich, there are a few things you need to do:
- improve the design (someone offered help already)
- add an initial amount to the jackpot, maybe 1 BTC, better more. If nobody enters and you still have to payout the sponsored 1 BTC, then you'll lose it. But nobody will pay 0.10 BTC for a chance to win 0.02 BTC.
- give more infos, like traffic, number of participants, current jackpot subtracted the fees, security measures, previous winners, etc etc This is needed to build up confidence.