I forgot this was happening so I've missed half a day already, but I have an idea for it:

You're an adventurer who goes into dungeons, sifts through the junk you find there, then comes back and sells it to traders. But you only have limited space in your backpack and the traders want different stuff each day, so you have to try and maximise your profit over several days. (Final result may or may not look better than this)

Last time I entered LD I spent basically the whole weekend crunching to make the best game I could. This time I'm going to limit myself to 15 hours in total (plus a couple extra for packaging and uploading) to make sure I still have time to sleep/leave the house/speak to my family/etc. But the way I split my days last time worked well, so I'm going to follow the same plan:

Day 1: make all the mechanics

Day 2: build the level(s) and balance everything

Day 3: art/audio/polish

Let's see how far I get!