Just for anyone else, if you need to test you can run some code like:
g.clear(); for (var i=0;i<72;i++) g.drawImage(require("Storage").read("messageicons.img",i*76,76),(i%7)*24,Math.floor(i/7)*24)
And it'll dump all the icons to the screen so you can see if they're ok (although right now there are too many to fit on one screen!)
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Just for anyone else, if you need to test you can run some code like:
And it'll dump all the icons to the screen so you can see if they're ok (although right now there are too many to fit on one screen!)