This document describes an interactive game called "selfie-DIFF" where players can create "spot the difference" (STD) puzzles using their own photos, drawings, or text. Players can share their STD puzzles with others and play each other's puzzles. The game is available on iOS and Android and allows players to create STD puzzles by modifying elements like colors, patterns, letters, and words. Players can also comment on, like, and share STD puzzles both within the app and on social media.