Almost great.
I like the test but I found some inconsistencies. The L character looks like a number 2 to me, I never forget it. So while some test answers I was getting wrong when I thought I understood and had gotten it right, now I know I’m not crazy... for the number two looking character it only gave r ch g/k and k as options. All wrong. This happened a few more times so now I can’t trust your app is teaching me properly.