Merge Colorful Butterflies is a complete Unity casual merge game project where players combine bright butterfly pieces to create higher-level species, unlock new designs, and fill a beautiful collection. The gameplay focuses on relaxing merging, satisfying upgrades, and rewarding progression as the board expands and rare butterflies appear. The project includes smooth touch controls, clean UI, scoring and reward systems, boosters, and a full menu flow with achievements or collection screens. Easily reskin the theme, add new butterfly tiers, adjust balance, and integrate ads or IAP loops for monetization. Perfect for mobile casual releases, idle-merge hybrids, and cozy collection-based gameplay with colorful visuals.