London-based social games studio Plumbee has released Sevens High on its flagship Mirrorball Slots product, the latest title from content partner Quickspin to go live in the app.

Sevens High is a slot featuring classic reel symbols, with every winning spin generating an automatic free re-spin, as well as paying out, with two consecutive wins turning a 7 symbol wild.

Winning runs are tracked in the game’s Wild Meter, which sits to the left of the reels, and continues until it is broken by a losing spin. Players can trigger rounds of ten free spins by hitting three bonus scatter symbols and hitting the scatter symbols again sets off additional free spins.

Plumbee slots producer Mark Claxton commented that the company has a “very exciting” games pipeline scheduled for Mirrorball Slots, with Sevens High the first title to launch in 2015 and “yet another very successful collaboration with Quickspin.”

“We believe that this game adds an exciting new dimension to our portfolio, and as we continue to build our multi-platform presence, look out for Sevens High coming to our mobile product, Mirrorball Slots: Kingdom of Riches, in the coming months,” he added.

Quickspin co-founder and chief product officer Mats Westerlund said the supplier looks to ensure that every game it produces for Plumbee stands out from other titles.

“With Sevens High we saw an opportunity to use recognizable classic slot symbols, but dress it up with contemporary music, and feedback,” he said. “The Progressive Wild feature has been well proven in Big Bad Wolf.”

“In Sevens High we take the feature to another level with stacked symbols,” Westerlund continued. “We can't wait to see it on Mirrorball since it is just as fun to play as it was making it.”

In related news Plumbee has launched a mobile variant of its popular app, Mirrorball Slots: Kingdom of Riches, in open beta for UK customers. It will initially go live for around 900 devices, with more markets and devices to launch soon.