The phrase "light puzzle" refers to a kind of puzzle that is easy and not very challenging to solve. It can be quickly figured out without much difficulty. Full definition
It isn't always as simple as jumping into a portal and moving along, but the game plays with light puzzle solving by bouncing back and forth. (nintendoworldreport.com)
This is a simple action game with light puzzles and an overwhelming cast of characters. (gamingnexus.com)
Moving through the game's four lengthy chapters mainly consisted of light puzzle solving and collection. (newgamenetwork.com)