Nope. Everything from scratch except the input system, some scripts, and a few sounds. I composed the music myself. (Music was my #1 well before games. Haha)
Thanks for the kind words! I had started on another project with a friend 2 weeks before the jam submission dates but it fell through due to life so I just quickly slapped this together so I could at least say I entered. Haha.
Edit: I forgot, I did use a loop I had on my computer for the lead sound in the music (royalty-free commercial use). Everything else though was all me. :P