INSIDE JOB

The sense of diving deeper into a multi-layered world is heightened by the stage-select screen, which provides glowing entry points to plunge into small sets of levels. These offer a subtle sense of progression, the first puzzle introducing you to an idea that is developed over the set, while branches provide tests related to the ones you’ve just completed at a higher tier of difficulty. There are unusual offshoots and one-offs besides, and you need only complete a handful of puzzles in each area to move on to the next.