Ultimidi

Build a small, playable browser game inspired by "Ultimidi" (genre not listed).
Concept: Ultimidi – piano learning web game.
Tone/hook (from the game's own page): Learn piano through short lessons, familiar songs, and a colorful musical adventure.
Tech: use plain HTML, CSS and JavaScript (or a lightweight engine you know); keep it to a single page that loads instantly with no login or install.
Controls: keyboard and mouse on desktop, shown on a short how-to-play screen.
Players: start single-player (the original's player count is not stated in its listing).
Core loop: include a visible score, a timer or round clock, an optional local high-score table, progress saved in localStorage.
Audio: add simple sound effects and music (start audio on the first click/tap).
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.