Gems Sky Slot by Zillion Games

Pink-winged princess, floating castles among the clouds, a purple cat in a golden frame acting as Wild - the anime fairy-tale skin is thick on this one. Gem symbols come in two tiers: the high-pays are faceted stones (ruby, emerald, sapphire, topaz) set in ornate gold mounts, while the lows are simpler flat diamond shapes in matching colors. Background art shows a stone bridge connecting two towers on rocky peaks above a dreamy pastel sky, and the princess herself stands beside the reels holding what looks like one of the bonus coins.

Five of those gold coins - each stamped with a cat face and a bet multiplier - trigger Hold & Ring. Coins lock, empties respin, new coins reset the counter. Fill all fifteen positions for Grand at 1,000x. Four jackpot tiers sit above the grid (Grand, Major, Minor, Mini), and a separate Wheel of Fortune path reaches them too - three WoF shields on the reels spin a prize wheel with all four jackpots as possible outcomes. Free Spins award 10 rounds from three princess scatters, and the Wild cat becomes a Walking Wild during the feature, teleporting to new positions between spins instead of vanishing. Random Wilds also fire independently in both base game and free spins, dropping two or more cats onto the grid at once.

The Accumulated Feature runs underneath everything else as a passive fuse. Bonus coins collect into a background meter during normal play, and when it fills, the game force-places symbols onto the grid - sometimes enough to push past the five-coin threshold and trigger Hold & Ring on its own. Same mechanic Zillion uses in Snow Wolf Saga and most of their other titles, but here those forced coins land against purple diamond-lattice reel panels and pastel cloud banks instead of snow or crystal caves.