If one finishes an exercise with 3 hearts, one gets 1 Lingot. Consequenly, one sees it being added to the Lingot score. I rarely have 3 hearts, but I often get 1 or 2 heart bonuses at the end of an exercise. Is there anyone who can tell me where all those heart bonuses go, because I can't see them appear anywhere?
You only get a single lingot bonus if you finish a lesson with all your lives remaining. If you loose just one life, you do not receive a lingot bonus, but you get one or two extra XP's (experience points).
I think you meant to say "thank you for your response" or "reply". Reaction is an odd choice of words there. What is your native language?