Meet MrSquare, the interactive learning companion inside Tetragon app. For the Rive Interactive Character Challenge, I integrated MrSquare directly into Tetragon, my math and physics learning app built with Kotlin in Android Studio. MrSquare isn't just an animation — he reacts to user actions, correct and incorrect answers, learning progress, and achievements in real time. My goal was to make the character feel like a natural part of the learning experience rather than a decorative element. Character animation and state machine created in Rive, then integrated into a native Android application using Kotlin. Download Tetragon here: https://lnkd.in/dnwUngGH @rive_app #Rive #Kotlin #AndroidDevelopment #AndroidStudio #MotionDesign #InteractiveDesign #EdTech #MathEducation #PhysicsEducation #GameDevelopment