Finn and the Swirly Spin by NetEnt is a five-reel, five-row slot built around a spiral layout, with symbols forming wins when three or more matching icons connect vertically or horizontally. Winning symbols explode and disappear, allowing new symbols to move into place. The game has a 96% RTP and medium variance, with a maximum theoretical win of up to 420x the initial bet before any extra value from Free Spins.
Several random features can affect the reels during play. Starfall Wilds adds two to five wild symbols, Dragon Destroy removes random symbols when no win is made, Irish Luck guarantees an extra line, and Magic Transform upgrades spade and heart symbols into higher-paying symbols. Players can use the demo version to play for free and practice before playing for real money.
Free Spins are unlocked by landing a Free Spins Key Scatter in the centre after wins are completed. Four bonus modes are available: Star Bar, Lava Lair, Lucky Mug and Golden Pot, each with different scatter requirements and effects, including added wilds, symbol destruction, guaranteed lines or symbol transformations. The game is designed around collecting keys through the spiral to reach the centre and open additional bonus rounds.