Vegas Jackpot Keno is the same as normal Keno. You need to choose up to 15 numbers out of 80 from a board, by clicking on the numbers you want. The software then randomly selects 20 numbers, and you are paid out for how many numbers you correctly predicted, according to a paytable. You can also get the software to randomly select the numbers you choose for you.
Vegas Jackpot Keno differs in that it has an extra jackpot win.