won't write much here, but you need to be good with PHP, PDO, css, html javascript.
here's some of the tasks that needs to be done.
Betting system.
payout system.
some Animations (a lot like a smal 20 sec Movie) no need for good graphics here tho.
pm me for more information and with some past works if you have any
How is the animation?
Maybe I can do it.