Flatland: Triangle Dancing

You're the brown square and you've come to pay a visit to your friend the gray triangle, who is wearing a terrific red, green, and blue outfit.

Use the forward/backward/left/right buttons to navigate, or turn simply by dragging the yellow point and relocate yourself by moving the red point.

When you've pressed Show Spaceland, you can see the view of Flatland from above--like humans would see it. But when you Hide Spaceland and Show Flatland, then you see only your view--the view from your red eye facing toward your yellow corner. In the Flatland view, things appear somewhat darker the farther away they are. Try understanding the Flatland view by comparing it to what you can see in Spaceland. Then, hide Spaceland and try navigating only by Flatland view.