i don/t have any lucky coins left to try it again but it's very simple, after you gamble, let's say 2 coins on Black ,when you click the "Roulette" word  to return to the home page appears a white page and on top left of the white page a word says "BLACK" . If the gamble was on  numbers then the white page will display 2 numbers (might be the extreme numbers of the bet).

Try to create a test account, get some coins , and gamble in firefox, i don't think operating system is relevant, get your prize if you win then click "Roulette" from the top navbar to go back to home/index page.
That left side of the top navbar with a link (Roulette, VitrualPub,Virtualpub,etc) we are using it to return to home page as tomos told us when i asked why there is no "Home" button when VP was in launch phase.

Edit : got a lucky coin and gambled again, after spinning the wheel the white page appears after the click on 'New Game' not on Roulette word, my mistake.