So basically I have the site Bitcoin Mafia.

I want to make it so that people can have a Bitcoin balance displayed on the site alongside the Mafia Cash so that people can purchase lottery tickets using bitcoin for a bitcoin lottery plus go to the casino and play actual bitcoin roulette to win/lose bitcoin. 

I could probably implement this in a simple way but I don't know how to secure the code and make it so that it's safe for everyone.

Sites like bittleships and luckycoin casino make it look so easy to deposit/spend/earn/withdrawl bitcoin, and I was wondering if someone would help me set that up.

I have other ideas for uses of Bitcoin in the game, but I'll leave it at that for now and see what you guys think.