oh yes, thank you very much for telling me, Dgcast04!
All of the music used for Winged Ones are royalty free, I don't quite remember where I got the one I used for the title screen ^^;
I must refer to my old notes, but people shouldn't be allowed to sell them unless they bought the license to use them commercially? Hmm... they should still credit the original owner though. I'm not sure what should I do about this, but if I do find out where the music came from, I'll try to notify the owner!
P.S. the release for google play is looking... gloomy :'D
the programmer I tried to work with doesn't seem to be a responsible person. If you read my updates from the last few weeks you'll know why x_x In the worst case, I might need to cancel it since I don't want to hand over Winged Ones to such person T_T I feel really bad and sorry about this