Add MIDI functionality to and update design of web app

Hi there, I'm looking for someone to help me add MIDI functionality and update the design of this JavaScript web app someone made for me a few years ago: [login to view URL] I'd like it to: 1) be controllable using a MIDI keyboard, plugged into the computer, instead of solely using a mouse trackpad, and 2) have the design updated, so that the keyboard is larger and so that it displays well on a mobile device. Give me a shout if you think you can help! Benedict