1. Dark Mode
Dark mode would add a more comfortable experience to my eyes. I am not used to Light Mode, so Dark Mode would be my best bet.
2. Remove hints feature
Hints should be removed becasue they aren't hints.They're the awnser to the question, so the question is wrong due to knowing the correct answer using the "hints". Hints should be replaced with examples that are similiar to the question, but they have different numbers and things like that. With examples, the student can understand better what the question is asking.
3. More tries.
I make tiny little mistakes in the questions, but KA gives no mercy and counts the question wrong when I try again, and even without using hints! Therefore, at least two more tries should be added.