Hi.  I've finished creating something playable but basic.  I may add special effects; I may not.  I may change background colours as such, but I'm not sure.  I'd like to get feedback on it.  Should I wait until after I've acted on feedback before submitting it to the jam?

Hi Grace! I'd recommend waiting. The jam deadline is far off, so you have plenty of time to ask for feedback and tinker with multimedia. Good luck!