I love these 3d screw pin puzzles, and this one is a fave. BUT, I feel like I have to let others know they have boards that are not winnable without a bonus, specifically the hammer. You’ll be able to get it down to two screws and the pieces are intertwined in such a way that you cannot remove either screw, thus the hammer is needed to break one or the other. In the case of the “cactus in a pot” puzzle you can’t even get into the cactus to continue unless you break a piece of it because the last visible screw cannot be removed. I wouldn’t really mind too much if this was an issue that occurred few and far between, but they’re becoming more frequent as you get into higher levels. Shame really, because overall it’s one of the better games of this type out there. It may not be intentional, but maybe they need to test their own boards before putting them out there for the public. I’m not opposed to using bonus items because the board is challenging, but i don’t think you should be forced to use them just because of bad design, or worse intentionally creating a board that cannot be won.