Use piano notes as game controls, then carry that practice back to an actual instrument. Ultimidi starts with small note-and-rest lessons and unlocks minigames after the first two introductory levels.

Maker XCSme describes a year of prototypes before settling on beat-based practice and games such as Sound Invaders. The disclosed AI contribution is the simple SVG artwork, generated in batches; this is not a claim that an AI teaches or assesses every part of piano playing.

You can start without an account and use the on-screen keyboard. MIDI keyboard input is also supported. Basic content and the song player are free; extra content is paid.

A musician’s feedback already changed one design detail: the creator replaced a metronome whose distinct pitches could interfere with learning the notes.

Songs:
game.ultimidi.com/songs

Creator’s account and the metronome discussion:
news.ycombinator.com/item?id=50241822