After, doing more tests. I found out a issue why menu/ hub textures weren't loading . They can not be in sub folders like stages and, characters.

Due, to the files are actually not on the same layer as the model wich is middle layer. While like art the buttons are a layer higher. So they wouldn't load the same way.

The hearts go as followed -
Blue is full health. Green is 3/4 heart. Yellow is 2/4 heart. Red is 1/4 heart . While black heart means the heart container is empty. To help show easier how your health is at the time.