4isX – A game to make the target from four digits

4isX is a puzzle game where players combine four given digits using basic arithmetic operations to reach a target number, designed for math enthusiasts and casual gamers who enjoy mental challenges. It offers a simple yet engaging twist on classic number games by constraining the solution to exactly four inputs, making each puzzle a compact logic exercise. The project is interesting for its elegant minimalism and its ability to turn a straightforward mathematical constraint into a surprisingly deep and replayable brain teaser.