Two things though, Z and X are not next to each other on French and German keyboards. ;) I wasn't able to kill much enemies (didn't see many being spawned?), but I still enjoyed the descent down.
Unfortunately killing an opponent is not yet implemented. We have all the necessary components and will add this as soon as possible. What Keys would you recommend in stead of Z and X?
X is cool, it doesn't really change much I think. As for Z, you also bind W and Y keys to the same action. A bit hacky, but solves the problem most of the times.