ConcreteCalc

This is an innovative number puzzle that cleverly combines falling-block mechanics with math rule validation. In a 9-row grid with customizable columns, colorful digit tiles continuously fall from the top. Players move tiles left/right or hard-drop them; when a row is completely filled and all numbers satisfy the active rule (even, odd, prime, ascending, or target sum), the row clears and awards points. Consecutive successful clears activate combo bonuses with multiplied scores. Four special boost tiles appear randomly for added variety. The game offers Classic, Pulse, and Rush modes, each with unique rule combinations and pacing — perfect for quick sessions or deep high-score strategy sessions.