LN Roulette? Interesting. What is the house edge of your game op? If it's lower than the average, your site could draw in many gamblers over time. If it's equal to the average or higher, I don't see your site becoming successful.
Also, the site itself needs to add stuff like FAQ, contact section etc in order to make it more appealing since it's very barebones currently.
LN is not very popular to use among gamblers. Even if this network has been here for quite long already, many still prefer to use the regular bitcoin network because of its availability to most trading platforms