Rules

Drop the next token. Tap a column, or press 1–4.
Match symbols to clear pads. Pairs connect across or down. Diagonals need three. A line of three can hook one more off either end. Falling pieces chain.
Hold a tile. Tap the Hold slot at the end of the queue to park the tile in hand, or to swap the parked one back in. Once a turn.
Full columns take one match from above. A full column shows ↓1 on top: drop one more of its top tile’s kind there. If the bottom three pads are drums or Xs, the top tile locks as the next drum; otherwise the two clear as a pair.
Every four changes locks a drum. Each clear after the first is a change; every clear bigger than a pair plays a moment over the beat for its kind. Locked drums keep playing.
Drop your locked drums. Clear beneath them: 60 for one drum, 180 for two, 450 for three, and more for each after. Sixteen pads of drums and Xs close the machine.
Play each token before the count runs out. Time up drops an X into your last column. Tap the screen to pause.

The symbols

Mix: One clear in five: one of the beat's effects over the whole mix for two bars, or the whole loop if longer.
Add: One clear in five: a fill.
Subtract: One clear in five: a drum already on the machine is muted for a bar.
Break: One clear in five: the beat's break.
FX: One clear in five: that drum into the delay, the room or a filter sweep for two bars, or the whole loop if longer.
Fill: A new tile, from 18.3: match 3 to play a fill.
Wild: Takes the kind of its best match. A clear of three or more with a Wild pays triple. On the last open pad it closes the machine.
Lock: Locks the pad it lands on, and every touching token of the kind it lands on.
Swap: Tap to blink, then tap another tile. Swap disappears; tiles above fall.
Bomb: Every token and X around it clears, diagonals too: 10, plus 5 a tile. Never a drum.
Drill: Goes straight down a column, full or not, and clears every token and X in it. Drums stay. Pays nothing.
Money: Plays exactly like a Wild and pays 100 when it lands.
Locked: A locked drum keeps playing as written.

Scoring
Match or bonus	Pays
Pair	+3
L of three	+9
Line of three	+15
Diagonal of three	+24
Super combo A diagonal with one off its side, or a line with one hooked off its end	+45
Four A T, a square or a line	+120
Five or more	+240
Diagonal of four	+300
Drop saved drums In one clear: one, two, three	+60, 180, 450
Drop a token Each ordinary token that falls when you clear beneath it	+3
Chain The second clear, the third, each after	+60, 120, 120
Lock a drum Extra for each drum	+3
A match from above Locks the parked token	+9
Wild in three or more	Triples it
Money	+100
Bomb Plus 5 for each tile it clears	+10
Lock tile Plus 3 for each drum it locks	+100
Full board Every pad a drum; an X counts a quarter	+900
No match	0

+24+60+3+60= 147

Later stages pay more: every amount is scaled by the stage, up to ×2.4 at the end. Every clear in a chain pays its own price, and each clear after the first adds the chain bonus. The rarer the shape, the more it pays.