Simple Futoshiki is a clean, modern take on the classic Futoshiki logic puzzle. Fill the grid with numbers so that no digit repeats in any row or column, while satisfying the "greater than" / "less than" inequality constraints between cells. Features: * Three grid sizes (4x4, 5x5, 6x6) with Easy, Medium, and Hard difficulty * Smooth, modern Material 3 interface built with Jetpack Compose * Puzzle generator with unique-solution guarantee * Animated ninja vs dragon chase scene powered by KorGE * Custom theming system with 4 color themes and multiple theme modes * Pause and resume with timer and ranking system * No ads, no tracking, no network permissions required 100% free and open source under Apache 2.0.