Sum Blocks by Elio Landa is a puzzle game where players combine numbers to match target sums shown at the top of the screen. At first, players drag individual numbers into a single block to create the target total, building fluency with addition and number combinations. As the game progresses, more blocks appear, each with its own target sum, requiring players to reason about which numbers belong where. Later challenges introduce overlapping blocks, when a number is placed in the intersection, it contributes to multiple sums at once. This pushes players to think flexibly about part–whole relationships, strategic placement, and how one choice affects multiple mathematical outcomes. The game builds number sense, addition fluency, and logical reasoning through interactive problem-solving.