Pile UP

My first project with Pygame.

It is a simple puzzle game using the pile abstract data type. 

I made all the assests myself except for the music, please don't sue me big N :D

GAME INSTRUCTIONS:

There are 7 colored blocks numbered 1 - 7 randomly distribuited between 7 piles, plus 2 empty piles. Each pile can only hold 4 blocks.

Your goal is to make so each pile is full and only has one type of colored block / number. They do not need to be ordered.

To pick up a block, just hold the left mouse button. To drop a block, release the left mouse button.

You can only insert a block into a pile if the top of the pile you are putting it on is the same as the one from where you removed the block.  The only exception is if the destination pile is empty, as you can insert any colored block.

You can undo your previous actions by clicking the right mouse button.

Your time will be displayed once you beat the game. To play again simply click the left mouse button.