“It’s like playing whack-a-mole,” Cumming said. In Zone 08, they tried a code-breaking game called Cipher Sequence, involving colored lights on the floor—and flunked. More exciting was ...

It's that variety that forms the basis of Google's Pani Puri Doodle, which is the company's interpretation of tile-matching games like "Candy Crush." You're not just chasing the big tile combos ...