As you can make out from the image, the game is based on Russian dolls (matryoshka dolls). The principle is relatively simple. You solve puzzles by ‘stacking’ – you can stack characters one size up from your current character to achieve certain goals. For example, at the start you stack up to a handyman who can then unlock a vent with his spanner. Then you have to stack 3 ascending sized Train Guild members to stop the strike from continuing.
After this first part, you unlock a secret area where your achievements are displayed, such as unique characters you have ‘stacked’ and a painting which has more parts added when you find more solutions to the same puzzle.
It’s an unusual mix of visuals (based on old movies) and gameplay style but it works really well.
I would definitely recommend getting this if you fancy a challenge or a break away from shootiness or sporting goodness!