Casino Blackjack app / mobile website

Ok this is the first part of a multi part project that I have in mind. That will grow with the user base. Kind of like how a character in a rpg levels up with experience. I want to create a blackjack bitcoin app / mobile site. However to start out their will be no betting against the house. Not on this stage of the project anyways. 520 750 1100 Stage zero will consist of: Blackjack tournaments. The user will select what bitcoin amount/max user from a list(ex. [login to view URL] listbox). Once selected they will do 10 rounds of blackjack against the dealer. The starting amount the user has is the amount they selected. The place the user finishes is determined by the amount they made at the end or if they lose all the money the tournament ends for that user. Another game would be "Shake a Day" The user pays bitcoin in order to shake five dice. All five of the dice have to match the number of the day. The number will be randomly chosen and be active for 24 hours. If all five dice match the chosen number they receive 90% of the pot. This is a popular bar dice game where I'm located and hope it catches on in the app. Since this application is dealing with bitcoin it needs to be secure.