Brain Games play online

Set of brain games and brain training. the difficulty is very varied, some being really complicated.
Do not despair, you will be able to save your progress and, with patience, you will be able to solve them. Or not.
Think, in any case, that just trying to do it will be good for you.
All games have a solution. Your challenge, find it.
For obvious reasons, solutions have not been included.
The explanations are implicit in the images.