GUI compass pointing straight up in relation to the player

I've been demo testing my game and the biggest complaint, other than the controls, is that it is very easy to lose your frame of reference and forget which way is up. My idea to resolve this issue is create a simple GUI image that always points points up with respect to the player. So if the player is at the regular up right position it will point straight up and if the player turns himself upside down it point down. I'm sorry if my explanation is a little vague. I don't exactly now how to go about this. Here is a link to the demo of my game https://sites.google.com/site/undercombat/ I love feedback and accept constructive criticism.