Nice pixel art you've got there
It wasn't immediately obvious that the 2 slots on the edges belonged to the characters; maybe use a different colour? And add a hotkey for reset.
@MeMeDumDum did an excellent job on the Pixel Art indeed.
And yeah, a reset hotkey and making the purpose of the edge slots more obvious is definitely something that we'd need to add to a post-Jam version of the game, if we ever make one.