# Fallegro

A musical physics game in your browser. Place the notes of a melody so that a
ball bounces from one to the next and plays it — Chopin, Beethoven, Mozart — in
time. A free browser game that is a physics puzzle and a way into classical
music.

Free, no ads, no trackers, no account needed.

- **Play**: <https://fallegro.com/>
- **About**: <https://fallegro.com/about>

## How it plays

1. **Listen.** Hear the phrase you are about to build: the melody and its
   accompaniment.
2. **Build.** Each note of the melody is a key tuned to its pitch. Drag the keys
   into the scene and tilt them. Their shape matters: a bouncy key throws the
   ball back fast, a soft one swallows its speed for a long note.
3. **Launch.** The ball falls and every impact plays a note. Hit them in order
   and on the beat, and the melody comes out of the physics.
4. **Score.** Each note is judged on its timing — perfect, great or good — for up
   to three stars and a score out of 1000.

## What you'll play

36 works by 14 composers, cut into 135 short phrases: Johann Pachelbel, Christian
Petzold, Johann Sebastian Bach, Wolfgang Amadeus Mozart, Ludwig van Beethoven,
Franz Schubert, Friedrich Burgmüller, Frédéric Chopin, Robert Schumann, Johannes
Brahms, Pyotr Ilyich Tchaikovsky, Edvard Grieg, Claude Debussy and Erik Satie. A
first course of nine phrases teaches the game; the stars you earn then open a
collection per composer.

## Why it is different

- **Every result is verifiable.** The physics are deterministic: the same
  construction gives the same result, to the bit, in every browser. The
  leaderboard replays each run on the server before ranking it.
- **Share a run, not a video.** A replay link rebuilds your exact construction on
  someone else's screen; once every phrase of a piece is done, your balls can
  play the whole piece in a row.
- **Learn who wrote it.** Each composer is introduced with a portrait and a short
  biography the first time you meet them.
- **Free, without ads or trackers.** No account needed to play; an email sign-in
  link is there only if you want your progress on several devices.

## Questions

**Is Fallegro free?** Yes. There are no ads, no purchases and no account to
create: you play in the browser straight away.

**Do I need to install anything?** No. Fallegro runs in any recent browser, on a
computer or a phone, in portrait or landscape.

**Do I need to read music?** No. Each key shows its note name and its place in
the phrase, and a timeline under the scene shows when each note should sound.

**Where does the music come from?** From public-domain works, via MIDI files of
the Mutopia Project, simplified so a ball can play them.

**How does the leaderboard stay fair?** The game sends your construction, not
your score; the server replays it with the same physics and only ranks the run
if the result is identical. Runs played after a hint or the solution are not
ranked.

**Can I keep my progress on another device?** Yes: a one-time code without an
account, or an email sign-in link. No password either way.