Hello.
No, I cannot open and use the boosters behind the blue buttons at the beginning , middle, or end of a session of levels. It worked a couple of times for me. Now it simply does not.
Hi Foley 1362 Thank you for replying. Unfortunately , it makes no difference where in the series I am . It worked a few times and now I try at the beginning, middle, it simply makes no difference. At this point they are sadly useless to me 😥