Some resources and advice for future:
Use https://freesound.org/, https://www.beepbox.co, https://pixabay.com for music and SFX.
Don't make game so contrast. Use neutral colors. Also here is palete designer.
Use last 30% of Jam Time to polish game. Give it to friends to test and gather feedback.
Check out, how to optimize game for size on you engine. Also, using UE for this is kinda overkill)
Good luck)