A high-fidelity 3D coin toss simulation featuring sensor-driven inverse parallax, custom physics smoothing, and a hidden gyroscopic stealth engine for controlled outcomes. Built with Jetpack Compose.

An HTML recreation of the 2026 Spring Festival Gala calculator magic trick. Enter 4-digit plus 5-digit numbers, hit  = , then buttons get locked (the "calculator face-down" part). Random taps only show [Date+Time] - your result . Press  =  at the end to unlock and reveal the hidden date-time number.