Nice! I like this a lot. I'm not usually a big fan of sequencers, but applying a physical interface like this where you literally move the onsets around is kinda cool.<p>This would be a great activity for kids.<p>What are you planning on doing with the project? You releasing it?<p>If this is done in Processing, do you think a P5.js version would work? Then anyone could just conjure this instrument up with a browser on a cell phone.