How do I make a scoring system with a slide puzzle game?

Basically when my sprite text is aligned properly I would like to have the game recognize this and move you to the next level/layout. This is what I have so far.

Have an array that contains maxScore for each level.

And you will have a current_Score for playing session. (this will be reset when starting layout)

maxScore = Array.At(level_Number)

When current_Score >= maxScore => Add 1 to level_Number

Go to layout (level_Number)

Cheers.