Gleamtide

Gleamtide is a rhythm game on a night sea where you write the tune, then play it back. Every song runs in calls and answers. In a call, two gleams drift in together on each beat: catch the gold one on the left for the plain note, or the blue one on the right for a bright note a third higher. What you catch is written into the tune and sounds at once; let both slip past and that beat is a rest. In the answer, the sea sings your tune back and you play it. Plain notes come in clearly; bright notes shine twice as much but come back hidden until the last moment, so you play them from memory, and a bright note you miss goes dark. Play an answer whole and the whole sea lights up. Seven songs and a daily song, all composed and synthesised by the game's own code with no audio files; stars from the light you gather, a grade for your timing, latency calibration, save slots, keyboard, touch or gamepad. It plays in the browser on desktop and phones.