Hover your cursor over a gem and tap the following keys for some fun stuff.

Effect	Code
Reset tutorials	T
Spawns a bunch of Red Gems across the board at once	N
Turns selected gem into a Blue Gem	6
Turns selected gem into a Butterfly	9
Turns selected gem into a Coin	C
Turns selected gem into a Flame Gem	F
Turns selected gem into a Green Gem	2
Turns selected gem into a Hypercube	H
Turns selected gem into a Lightning Gem	L
Turns selected gem into a Purple Gem	4
Turns selected gem into a Red Gem	7/0
Turns selected gem into a Time Bomb	B
Turns selected gem into a White Gem	1
Turns selected gem into a Yellow Gem	3
Turns selected gem into an Orange Gem	5