For this jam I'm allowing bug squashing, uploading new builds, and a little bit of polish (i.e. not new features, just things like fine-tuning difficulty etc.) :)
Good to know, it bugged me our game didn't run well on lower end machines and laptops; for simple graphics and quality. As well as forgetting to add the option to view the games instructions/controls (forgetting to tick an 'enabled' checkbox).