Make The Row (Extra)

This application helps you to improve/exercise your math abilities.
It is an extended version of MakeTheRow with a distinction that here if you have made a mistake on the Level 4, you can start over just from the row where you are (all previous solutions will be saved). And no ads!

The rules:
Try to make a row from the provided squares in the following way:
it has to be one square between squares with "1" on them,
two squares between squares with "2" on them,
three squares between squares with "3" on them, and so on.
Just simply press the square you would like to add next and the row will
grow.
Enjoy!