Added code to play music on level up and on death

Attempted to amend tabbing problem

Corrected death music playing code

Hopefully fixed tabbing issue

Tried to fix tabbing again

Added check to prevent death music from being overwritten by explore music

Dropped part of the large if down a line to help readability

Switched to using method ::isDead

Corrected logic error

Correction to the last correction

Correction to the Correction to the Correction