Mr Speaker

End result: Hit save in Pixelmator, web page automatically reloads with new PNGs.
Tools: Pixelmator (image editor), Grunt + LiveReload (task runner), Automator (Mac automation thingo), Bash (Bash).

I'm generally not a fan of automating tasks, unless the task is consistent over multiple projects and over long periods of time. Automating things is fun - so you quickly lose track of how much time you reeeaaallly spend on it and, more importantly, automation tends to be subject to "digital decay" - project structure changes, build tools update dependency versions (or disappear entirely), things require maintenance. Finally, the build tools and scripts become part of your code base: which is a cause of incidental complexity. Anyone touching your project needs to not only understand your code, but also all the extra cruft around it to "save time".
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Pixelmator is a fantastic image editor for Mac, but it lacks the ability to stretch an image via a "nearest-neighbor, big pixels please" method. I know, right?! Anyhoo... I made a Quartz Composer called plugin Pix Up, Look Sharp that does it for you, allowing you to set the width and height scaling amount.

To use it, simply drop the plugin in your ~/Library/Compositions/ folder and it'll appear in Pixelmator under "Other" in your effects browser. I can't figure out how to resize the destination output area from within Quartz itself, so you first have to stretch your canvas to accomodate the new pixels before you run the plugin. Sorry 'bout that. Hopefully pixel stretching will be included in a future version of Pixelmator - but until then: Pix up, Look Sharrrrp!

Ludum Darer JellyCakes has been live streaming his playing-and-rating efforts of entries in Ludum Dare 26. He's an excellent reviewer: testing each game very thoroughly and fairly. And he's hilarious. After giving my entry a good run through its paces he concluded with the above video. Might not fit the competition's theme of "minimalism", but dang... it's awesome!