Remix: 3Sec Patience

Build a small, playable browser game inspired by "3Sec Patience" (Puzzle).
Concept: 3sec — Hold a button for exactly 3 seconds with no timer, no hints, just your raw sense of time.
Tone/hook (from the game's own page): Hold a button for exactly 3 seconds — no timer, no hints. Can you feel time passing? Free game, works on iPhone & Android. No download, no signup. Play now →.
Tech: use Vanilla JS / Canvas; keep it to a single page that loads instantly with no login or install.
Controls: touch controls (tap/drag) that work on a phone plus keyboard and mouse on desktop, shown on a short how-to-play screen.
Multiplayer: the original is listed as multiplayer. Start with a local or bot opponent, then add online play (e.g. WebSockets) once the core loop is fun.
Core loop: include a visible score, a timer or round clock, progress saved in localStorage.
Steps: 1) get the core mechanic playable with placeholder shapes, 2) add win/lose conditions and restart, 3) polish feel, visuals and sound, 4) add your own twist (setting, character or one new rule).
Make it your own: don't copy the original's name, art, text or code.