Definitely.
I've already begun code on the post jam version: https://hackeddesign.itch.io/mouse2064/devlog/172088/post-jam-updates
In summary:
I borrowed the idea of 'Mouse' from another game/story I'd been messing with in another game for ages and ages. It was a top down rpg, which had no combat (at least, nothing to speak of). I liked the story I had in my head, but the gameplay wasn't going anywhere. And I was using other people's art, which, while awesome, I wasn't thrilled with. What ended up in the jam version was a completely different game. I kept the angry and out of work theme, and the character, and that was about it. I intend to reincorporate some more of the story into the jam version, add the backstory, world building and an prelude/tutorial section.
Someone suggested switching from 64x64 to 128x72 (16:9) and it was a good suggestion.
People were clearly having issues with the controls, so I intend to work on those, making them easier/clearer.
I want to incorporate more of a boss fight feel into the end of each level. Hard when there's no health, but I have ideas.
And there's so many other ideas to expand what you can do in game. I might even add some basic rpg elements into it. But I want to keep the fast quick draw game play.