Congratulations for making a submission as a solo developer!.
For the music i recommend you to be careful with chromatic notes, you did a music piece on A minor which naturally only has the white notes of a keyboard, i see you tried on making it a melodical A minor scale with a F# and a G# but you went, on the piano, A, E, C F#, C, C G#, E, which has a tritone between C and F#, and C and G#.
Tritones are a bit hard to use because these are chords or intervals that generate some tension, chords that crave for a resolution, and you are also adding a G# which makes that melody a bit more unstable.
If you are just starting on music, i would recommend you doing something easier, tritones and changing chromatic notes are not a very easy task, on A minor you could actually, stick with only A minor, D minor, and E minor, (E dominant seventh being pretty common too, E, G#, B and D).
You can also use reverbs or equalizers to make your instruments sound much better.
Also, i do not think the music for this has to be as spooky, this game it´s more lighthearted.