Symbols drop into the grid; the aim is to get the biggest cluster of symbols possible (five or more). Only the highest win in the cluster is paid, then the winning symbols are removed, followed by new symbols that cascade to fill the gaps. Multiple clusters of the same symbol that are not connected are paid as separate clusters. On any non-winning spin, there is a chance for four to seven Random Heart Wilds to be added to the grid. Heart Wilds can substitute all symbols except Keys. Agent symbols are collected when they form part of a winning combination; collect six to unlock the associated Agent feature. Alternatively, the White Rabbit may randomly appear and instantly unlocks an Agent feature. Agent features trigger after winning combinations and cascades finish. If multiple Agent features are unlocked simultaneously, then the sequence in which they play are as follows: Cupcake Splat, Smokin’ Phat, Grinning Cat, Mad Hat. Agent features cannot be re-triggered and are guaranteed in the Queen’s Heart Free Spin. Agent features reset at the start of each spin.