What have I fixed:
- Bosses getting 1 shot no longer breaks
- Upgrade selection no longer break when using a controller
- You now have some short invincibility when you finish a room
- The double boss can't come back to life
- The walls in the chest room actually exist for projectiles now
- Some of the mage boss' attacks now have more of a delay

I think that is all.

I have also made it so that the amount of deaths the player has is shown on the death screen.