I’m done for the first couple hours. I don’t have much yet, but I think I have a workable idea. Here’s a pathetic screenshot:
You can try out the movement (arrow keys only just now) and swap between normal and tiny world with ctrl and alt keys (for now) at my live demo page.
It’s glitchy and doesn’t do much, but I have an animated world sprite and the start of a plan for my first full day tomorrow. Step one, get some sleep!