To have some better performance, I applied some code deleting broken objects after a couple of seconds.
Also, once a broken piece hits the ground and has no velocity, its rigidbody and collider will now be deleted. This makes the player being able to walk through the broken pieces instead of getting stuck between them.
Another small thing I did was adjusting the proportions of the player so now it doesn’t look like you’re an angry midget anymore.
You're Fired! 