Patrick's Coin: Hold The Spin Slot by Gamzix

Three levels of free spins, and the game tracks your progress between triggers. Level 1 strips the reels to high-pays, Wilds, and Coins for 8 spins. Level 2 opens the full symbol set but bumps you to 15. Level 3 returns to 8 spins and randomly converts one regular symbol type to Wild each round. After Level 3 completes, the cycle resets to Level 1. The buy option triggers whatever level you're currently queued for, so there's a minor tactical angle to when you buy in.

The base game runs on 20 fixed paylines with an Irish woodland backdrop - deep green foliage, a massive oak tree on the left, and glossy 3D card royals in blue, green, pink, and red glass. High-pays are a golden horseshoe, a smoking pipe, a frothy beer mug, and a leprechaun's top hat. A leprechaun Wild substitutes for everything except Scatters and Coins. Scatters only show up on reels 2, 3, and 4 - three of them fire the free spins.

Six or more Coins anywhere on the grid start the Hold The Spin bonus, and it triggers from both the base game and free spins. Coins carry values from 1x to 16x your bet. Three respins, resetting on each new Coin. Mystery Coins add an extra layer - they only appear during the bonus and crack open at the end, each turning into a Bronze (20x), Silver (50x), or Gold (150x) jackpot. Fill all 15 positions and the Platinum jackpot drops at 5,000x. The four-tier jackpot values display above the reels at your current bet level, which is mostly decoration until you're actually inside the bonus collecting them.