Homepage: Straight and too the point with Login, Register, and learn more as the main features accompanied by a brief description of who we are. Slideshow would be very nice.
Login page /Register page: Sleek login form design with user registration next to it with username field, password field, email field.
User Panel: Includes profile picture, username display, place bet buttons in middle of screen (Big Buttons and main feature), won matches counter, change password, deposit money, withdraw money.
Check Match Page: This page would need to have a "Waiting for match to finish" text/graphic in the middle of the screen plus a "You bet X amount" text/graphic underneath that.
You Won / You Lost page: The same page design as the check match page but with either a "You Won $X.xx" text/graphic or a "You Lost! Better Luck Next Time" text/graphic.