Mega Block — Stack & Cascade

Each round drops coloured construction blocks onto a variable grid in the spirit of Tetris. The blocks settle wherever they fit, and any group of five or more touching blocks of the same colour forms a paying cluster. Bigger clusters pay more, and the grid itself can shift in size between rounds — sometimes you get a tight 6-row layout, sometimes a sprawling 8x8 build zone. That variable footprint is what makes the math behave differently from spin to spin.

Multiplier Blocks land at random and look just like regular coloured blocks except for the value badge stamped on top. When a Multiplier Block becomes part of a winning cluster, its value is applied to that cluster's payout. Several Multiplier Blocks in a single cluster stack together — two x3 blocks in the same cluster pay nine times the base, and the rare x10 block can swing a single cluster into the high hundreds. They appear roughly every 7-9 spins.

The Mega Block Bonus triggers when a winning cluster grows past a set size threshold — usually 12 connected blocks. The grid then compresses several blocks into one supercharged Mega Block that counts as a whole cluster on its own. Cascades clear matched blocks and let new ones drop into the gaps, and inside the bonus those cascades chain until no fresh wins form. The 5,000x cap lives at the end of a long cascade chain with stacked Multiplier Blocks inside the bonus.