Think Plus+ 4x4

In this game, you have to blow up different colored squares. Each square has an initial value of 1, a group of the same colored squares adjacent to one another, exploding together.
Total score value of a group of squares were blown up, added to their neighbors squares.
You need to reach the target total score, and the scoring target the particular colors.
At first it looks pretty easy, and further, it is becoming increasingly challenging.
Enjoy