Love the simplicity and immediacy of the interface. Storing the pattern in the URL is also awesome, have you considered compressing the string to shorten to URL? (or is it maximally compressed? I guess we can't know..lol)

Here's a random beat I made in about 2 minutes. https://drummy.io/#&p;,eJwz0TE20jE0MtAx0THUMQBjGETnI0SR5TBVE...