Color Debt

Merge neighbouring tiles as additive light: Red plus Green makes Yellow, and so on. Every mix that is not pure White writes a debt of the inverse colour to a 3-slot ledger, so each merge asks whether you can afford it. Pay a debt by tapping a tile of that exact colour, then tapping the matching coin in the ledger, free of charge and counted toward the level goal. Mixing White clears the whole ledger at once but leaves an inert tile that clogs the board.

Tap a tile to pick it up, tap a highlighted neighbour to merge, tap the ledger to pay. A run ends if the ledger fills past three unpaid debts (bankruptcy) or the moves run out before the level goal is paid off; each level raises the goal faster than the move budget.

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