This level belongs to Home Row Foundation — master the home row keys - the foundation of touch typing. It drills J, K, L and semicolon.
The target is 15 words a minute at 85% accuracy. Three stars need 35 words a minute at 95%, so there is a reason to come back to a level rather than pushing on through material your fingers have not absorbed yet. Accuracy is worth more than speed here: going fast and correcting constantly is slower than going steadily.
Words you will type include jll, kjl, llk, jkl, lkj, klj, jlk, ljk.