Hi, I just downloaded the Linux 64-bit version of heXon from your itch.io page, and I notice that the version I received lists the license for the music track "Bulletproof MagiRex" as CC-BY-NC-SA 3.0. However, on the Gitlab repo for the game, this license has been changed to CC-BY-SA 4.0 (here: https://gitlab.com/luckeyproductions/heXon/blob/master/Resources/Music/Licenses). Perhaps the download on here has not been updated yet? Just thought I ought to let you know :)
By the way, great game!