I enjoy this game a lot - I put off getting it for a year or two because of the name - there's nothing 'biological' about the game in my opinion- the red piece is the 'virus' and you move the other pieces around until you can slide the red piece out. There's a booklet with different setups - if you're familiar with Thinkfun's Rush Hour concept then this is a step or two up in challenge - in this one the pieces slide diagonally and not side to side - and the pieces aren't all linear - some are some aren't. some pieces 'point' in the diagonal direction and others seem to slide sideways or zig-zaggy. some pieces can slide partially out of the exit and pieces nestled together can also slide together and/or separate as needed. I don't know about the age level but I'm 46 and found the game both easy and challenging and some of the easier puzzles challenged me the most. I had to look up some solutions or partial solutions then re-did the puzzle a few times to 'get it'. I find it relaxing and time goes by fast. I'm glad I found this one on clearance right before Christmas but if I'd known how fun it was i'd have paid more. my next favorite games from this company are hide and seek pirate and safari though I think both may be discontinued :-( Camouflauge is also a fun game by this company- all 3 are different enough to be worth getting all. airport is similar to camouflage in concept - just different topic. and I think aqua belle which seems to be new is the same as these 2.