Just answer the questions! You get a point whenever you get a question right. The answer streak shows you how many questions in a row you have gotten correct. The time doesn't matter, it's just there if you would like to know how long it took you.
I was working on memorizing perfect squares earlier today and decided to make a Scratch project... Hehe by the time I was done with this I already had them memorized :3 Enjoyyy! <33