Literally the first try on this game. I decided to try a bonus buy on 0.20 euro stake, with a cost of 15 euro.
Then suddenly it gave a spin with premium green symbol on reels 1, 3 and 5, added with 8 wilds on reel 3 and 15 wilds on reel 5.
Resulting in this in to the sane total win:
https://prnt.sc/1vld553