This video is for a walkthrough for Lara Croft and the Guardian of Light on the first level “Temple of Light.” You will end up doing about two walkthroughs for this level (and probably for the others as well) as your first one will require you to get 7 of the 8 challenges completed. Because you’ll be going for all challenges it will take you longer than 6 minutes to run through it this why you need to play through it twice. The last challenge you’ll get will be to play it within 6 minutes or less.
This level is fairly easy in terms of the puzzles you need to solve but as you progress in the ‘story,’ they will become a little more difficult and require you to put a little more thought into solving the puzzles as well as mapping out your gameplay throughout.
You will also receive three achievements during your playthrough:
Overachiever 15 
Complete any level-specific Reward Challenge
Breadwinner 25
Earn the top score objective in any level
Seeing Red 20
Collect all 10 red skulls in any single level