I wanted to include worry as well as stress in my game because it is a very common feeling but the two also feel different from each other, being worried about a project and being stressed about a project can be vastly different.

Research:
In one study on worry, scientists compared the brain activity of 35 undergraduate students with varying degrees of worry and generalized anxiety, from little stress to diagnosed generalized anxiety disorder (GAD). The study showed no significant difference between the way the brain processed and handled worry in any of the participants. It was found that brain activity associated with worry increased activity in the sympathetic nervous system and decreased activity in the parasympathetic nervous system. In simpler terms this means the brain’s reaction to stress in the environment was to prepare itself to fight or flee the situation. The worry related brain activity of each participant was not significantly different from the next, suggesting that the human brain processing of worry is very similar for every person, no matter the severity (Hammel, Smitherman, McGlynn, Mulfinger, Lazarte, Gothard, 2011).
Source: Jacinda Hammel, Todd Smitherman, Dudley McGlynn, Amanda Mulfinger, Alejandro Lazarte, Kelly Gothard (March 2011). Anxiety, Stress & Coping. Vol. 24 Issue 2, p121-136.

Design:
I wanted Worry to be more immediate looking than stress. I felt Stress could grow and change shape and form to different things, grow bigger and consume if that’s how the person was feeling. However, Worry I wanted to be a grating looking thing, something that wore down the brain like a saw or cheese grater. This is also why I chose a much brighter pink color as I wanted to possibly remind the viewer of Stress, with red being the complementary color of Stress’s green, but not explicitly have the color schemes match.