How to play : three balls bounce around the black "play area". Click to add obstacles or click on obstacles to remove them again. When the balls hit obstacles, they play notes. Constrain the notes into particular scales with the radio-buttons on the side. Adjust the speed or volume of each ball by clicking somewhere along the bars.
Please note, this is pretty experimental. Currently reported working : Firefox, Chrome on Ubuntu/Linux, Chrome on Windows, Android (in Portrait mode). Safari on Mac kind of works, except it screws up if you scroll the page.
Gbloink! was originally written by me (Phil Jones, @interstar) as a Windows program in 1997. I've been waiting about 15 years for the browser to be able to reliably do this. Maybe its time has finally come.