how to do test to get hearts WITHOUT your hearts go to ZERO?

Question

I only have 1 heart left now....

Answer 1

Try using bits to refill your lives! They come in handy! Also, whenever you get a question wrong when going through a course, check the comments, they'll be unlocked to see as long as you've answered it and don't go back. I'm afraid that for tests, there are no comments availible, but you coud check the questions and pages before it!