I'm not able to get a particularly good GIF of what I want to show, as it's just too long, but here is what I got:

The concept here is a sort of intertwined narrative with the same place being explored at two separate times. I have essentially an entire set of levels done, although they are almost certainly not all going to be beaten by anybody -- I might try to make a couple more easier ones.

Now what is left is sound, polish, title screens... most importantly, I have a concept for the end of the game that I'm hoping I can implement.