Funny how the following is an excerpt from the games description:
The gameplay is optimized for Keyboard use. Z=Attack, X=Magic, C=Block.
True it does not mention movement but it does let you know 3 of the keys that are used...
Not everyone downloads and plays the game on the same day and when you start the game, there is no reminder, warning, or disclaimer that shows to hit x on the title screen.
Clicking doesn't work. Hitting space bar, escape, or E didn't work. Hitting all the other keys on the keyboard didn't work. My instant thought was that the game was broken and that should never ever be the first impression for any game.
Just askin for small text at the corner of the title screen that says "press x to continue". That's not difficult nor unreasonable.