good morning omniorcus, that the keys dont show theyre color was intended, cause there are 4 chests for 3 keys. it should force you to keep track what you found tried etc via pen&paper.
the music is kinda anoying thats right :D first time i played this instrument(my brother brought it for the comp to me and teached me in a 10 min try). the announcements are my voice yeap.(they said all should be done by me so why not ALL :) ) i used audacity to cut the sounds in size and just learned in this project handle sounds (well in libgdx no big deal but without all experience in sounds). for next time i will set higher goals and hope put all i learned here into the next(i will make a updated version between the years if someone is interested to puzzle it again ;)
also to you a thank for your comment and hints for the future