Great stuff! Might be worth uploading the files as WAV or MP3 or something. I'm testing using them in Unity and M4A doesn't work with Unity(Not sure about Godot or Unreal but I'd assume they are similar). I'm sure most game engines work with MP3 and WAV. I'd recommend WAV since it's an uncompressed lossless format. Anyway, again love the tracks keep up the good work!