Smoother gameplay and a sleek new interface are on offer for mobile slots players at WinADay Casino after the popular online site announced details of a major new technological upgrade.11 of WinADay's instant-play mobile titles have been transferred to HTML5 format making them compatible with any devices using the iOS 6 (and above) operating system including iPhones and iPads. Android users won't miss out either as the new titles are available on that format too.It's not only 'under the bonnet' that has seen an improvement. WinADay's player interface has also undergone a remodel, making it even easier to browse on phone and tablet tap-and-swipe screens. Michael Hilary, WinADay’s casino manager, explains the thinking behind the switch. “Our games load really quickly. One of the complaints I’ve heard about other mobile casino games is that they take so long to load so we made sure that ours were fast!” So far 11 of WinADay's penny slots have launched in the HTML5 format with a trio of brand new penny slots due to be added this June. The new titles set to go live this month include a classic pub-style fruitie featuring free spins, a magic-style game with a Double Wild symbol and a new Native American-inspired title offering an expanding Wild. The latter two titles will also offer players a Pick Me bonus game. WinADay is marking the sixth anniversary of its launch this month and the celebrations continue courtesy of the site's Birthday Slots Tournaments which continues until end of June. Players also have until the end of the month to qualify for Game of the Month prizes which are double during the birthday month.The month-long, $21,000 Birthday Slots Tournament Series continues too with $700 in prizes awarded every day. Taking part couldn't be easier as WinADay tournaments don't have entrance or registration fees. All competitors have to do is play the designated tournament game of the day to be entered automatically. Tournament games include new slots like Dollar Storm and Gladiator Games as well as popular old favourites such as Wheeler Dealer and Gold Boom. Appropriately enough, WinADay's Game of the Month is Birthday Bash. For every 500 rounds played a player will earn one ticket into the end of monthdraw where $1000 will be awarded. Prizes are doubled for VIP players who stand to win $2000.