@everyone talking about controls:
did you know that you can usually change your control scheme?
I am having a german keyboard, so z is in the top row,
y in the bottom row.
if I wanted to, I could change my keyboard layout to english,
so that the letters respond as they would on an english keyboard.
i can't say for sure about other countries but you can sure switch to english layout in one way or another.
I am already quitde used to the kind of weird way to hold my left hand to use the z and x button, so I won't change it.
but if you are new to these kinds of games and the x,c,z buttons being apart is a problem, just change the layout to english.
Even though it may be also confusing to press the y button and get a z button reaction.
well, your choice.