Hi there!
Both of the songs used in the game are royalty-free tracks from Music for Makers. The tracks are Persevere and Broken. Unfortunately, they are on the pricey side if you want to purchase them since they're royalty-free tracks... The versions used in the game are actually shorter because Music for Makers does this thing where they send out free "sample" tracks every week and we used those free tracks for the game.
Thank you so much for your interest and support!