Door Trouble
Sketch The Door Problem This door is a veil of color that of which only objects of the same color can pass through. In the arena, there is a pillar of light that the player can put crystals into that change the color of the light. Eventually, there will be levels that require multiple crystals to make more complex colors. This door never disappears or moves, but rather pulsates when objects of the correct color pass through it. The player's gun will be colored to whatever color they are to make it easier to tell what their current color is. The door will be large enough for any moveable objects in the game, including the player. The player may pass through the door any number of times so long as they are still the required color.