How to play:
	1. Navigation:
		Move the green cursor left, right, up, and down using the left, right, up, and down arrow keys respectively.
	
	2. Gem swapping:
		Press enter on a gem and move the cursor towards the gem you want to swap with.
	
	3. Score:
		The score increases by 100 when you place 3 equal gems together, by 500 when you place 4 equal gems together, and by 1000 when you place them in the shape of an elbow.
	
	4. Running time:
		The game will run for 2 minutes. Time is shown by a green bar at the left side of the board.