Here's how you can make any coin use html5:
https://vid.me/xM4

nothing special about I/O

Here's the IOCoin source for anyone that wants it: https://filetea.me/default/#t1sy2v9Bz0nQ3ut0s7MjzeNXg
Just use jsbeautifier.org on the build.js its minified, but its relatively easy to figure out