Block the dog

The dog wants to escape the maze. And they will eventually. But it's up to you to delay their escape as much as you can. Move the blocks to change the shape of the maze. The only rule is that the exit must remain accessible at any time. Hold the dog in the maze for as long as possible.

This is a small game made with Python (using pyxel engine) in around 03h20 for Trijam #204.

Controls
Mouse: click the block you want to move, then click the place you want to drop it.