Finn and the Swirly Spin by NetEnt uses a 5-reel, 5-row grid arranged in a spiral layout. Wins are formed by three or more matching symbols in vertical or horizontal lines, after which winning symbols explode and the remaining icons move into place. The slot has a 96% RTP, medium variance, and a maximum theoretical win of up to 420x the initial bet.
The game includes several random features, including Starfall Wilds, Dragon Destroy, Irish Luck, and Magic Transform. The Free Spins Key symbol starts at the bottom-left of the grid and moves toward the centre as wins unfold, unlocking bonus rounds when it reaches the middle position after all cascades are complete.
A demo version is available to play for free, allowing players to practice before playing for real money. The bonus structure includes four Free Spins modes: Star Bar, Lava Lair, Lucky Mug and Golden Pot, each adding different effects such as wilds, symbol destruction or symbol transformations.