Thanks for playing! Not letting the player to rotate pieces wouldn't just make the game difficult, it'd be bullying! :D
I'm glad you found out about the rotation! I thought the control scheme below the game was clear enough. my bad!
That's just me being lazy and not looking at the description. Just assumed it's Z/X, and well... X worked! ^^
Haha! I always use X and C. Because on some keyboards, Z button is on the left side of Shift. and that makes it difficult for the player.