Connected Crates

A puzzle game, where you and all the boxes have to get to your goals, but all boxes are connected into one entity using chains and cannot be broken. Your goal is to fill all goals and get to the flag without breaking the chain

Controls: 

Move: Arrow keys or WASD

Undo: Z

This game was supposed to be made for the Jame Gam #9, but i didn't make the deadline by about an hour