I ignored the optional palette restrictions, because they confused me.
10 colors. Since it's a limited color count, I'd need to go back and optimize it, because I just color-picked based on need for this scene.
This would be a simple mystery game with arrow key movement and point-and-click interaction with various story elements. An emphasis on mood would be critical. For example, in this part of the game, you have no flashlight, and you're walking through the woods until you come upon this scene. That's all I have for now.