Neither could I; I couldn't get past the second page of the tutorial. "Extend the 3 and 4 into two lines" is ambiguous, and nothing seemed to make it proceed.

Neither could I; I couldn't get past the second page of the tutorial. "Extend the 3 and 4 into two lines" is ambiguous, and nothing seemed to make it proceed. It needs context help at minimum. It also can't be backnavigated out of and must be manually homed or killed.