Doc Ai it doesn't matter if you are not selling the game, that is also infringment, fan art and stories based on the character may be protected, but using the same logo and images, that would be considered infringment.
For a game to play the music, you have 3 types of audio file: ACC, OGG and WAV. If you have those 3 imported into your C2 game, then the will probably work fine in every browser.