No more spawning underground

A couple more bugfixes, including for a very vexing problem that we seem to have made worse by trying to prevent the player being forced out of the world with physics... hopefully nobody will be seeing the underside of our level again for a long time!

Fixed bugs:

• Spawning underground

• Outlines where we din't want any

Known bugs:

• Enemies will sometimes not move, can be worked around by restarting the level

• An intended speed run route skips a checkpoint

• Restarting in the slaughterhouse may sometimes not give the player the speed mutagen, but the revolver with 6 bullets instead

• Physics can force the player out of the world

• Framerate can really suck in general

• Controllers can not operate the pause menu, only show or hide it

• Inventory screen doesn't work

• Objectives screen is nonsense

• Random opening door sound when starting the level

• Enemies turn around too slowly

• End section buzzsaws do not always kill the player

• More animation jank than you can shake a stick at

• Weapon swap will not change to correct pose for gun arms