Spot the difference XXL

Every set of pictures has 4 differences for you to find.  

Choose from the following categories: animals, landscapes, buildings, food, sports, etc. 

For each stage you have 40 seconds to find the differences and you can use bonus features like hints, time boosts, etc. 
Work towards several achievements including reaching level 20, spotting all the differences in under 10 seconds, finishing a level with no mistakes and much more!

How to play:
Choose a picture and when the timer starts, tap the screen wherever you spot a difference! 
The faster you spot the differences, the higher your score!

Enjoy.