How many waves is Z-Type?

How many waves is Z-Type? Normal mode is aimed at beginning to moderate-level typists; it starts slow and gradually builds in difficulty. Expert mode throws you right into the fray within five waves. You can pause the game at any time by hitting the ESC key.

Normal mode is aimed at beginning to moderate-level typists; it starts slow and gradually builds in difficulty. Expert mode throws you right into the fray within five waves. You can pause the game at any time by hitting the ESC key.