Before release:

	general -- fix laser collision detection.
		add detection of shields
		add detection of friend
		properly handle when multiple collision objects
			on screen at once

	door explosions should be cropped

	after teleport, re-run room boundary calcs
	when calculating room calcs, take Y position into account
	
	L1 -- fix run/jumping
	L1 -- fix beast ending
	L1 -- fix slugs

	L2 -- add doors
	L2 -- disable door/powerline by shooting wall
	L2 -- add aliens
	L2 -- add minimal friend AI
	L2 -- add way to leave L2 to L3
		-- on cart screen, cart is still there at edge of screen?

	L5 -- add ending scenes?

	intro -- add music?



BEHAVIOR DIFFERENCES:

alien guard behavior:
	+ will punch you if you get too close
	+ l4, if you draw gun (but not fire) guard won't shoot you,
	  but instead will yell at you a bit

gun behavior:
	+ doors/walls should explode outward away from blast
	  *unless* there is another door/wall behind it
	+ laser should show sparks when hits shields/walls
	+ shield cannot be placed if room/floor wrong
	+ shield collapse animation if blown up with blast

door behavior:
	+ blasted doors, the remains appear partly in front


+ L1
	- underwater there is a water-motion effect
	- bubble motion is fancier in real thing
	- get out of water, you face forward unless key pressed
	  (we don't have a forward sprite as it looks weird)
	- arrival, the beast movement seems to depend on your xpos?
	- small things like birds flying are not implemented
	- beast on hill and 2nd screen -- complex, only appears if
	  you happen to leave same time beast does?  then movement
	  depends on xposition?
        - earthquake can happen while on rope?
	- sometimes falling rocks can follow you to next screen

+ L2
	- gun movement: gun is held by head when running
	- separate left facing vs right facing sprites
	- Level end: you should fall/scroll halfway down the shaft, then roll
		a bit before falling into L3


KNOWN BUGS:
+ ootw: pool monster grabs you a edge of pool (glitch)
+ intro: there's still a bit of a pause when the elevator door finishes opening

TODO:

General:

* Movement:
  + running: Missing one running frame (?)
  + ability to run+jump
  + running then crouch, you slide a bit

* sprites_to_draw:
  + physicist run+jumping
  + physicist swimming
  + beast tripping
  + alien running
  + friend walking
  + friend running

* underwater:
  + ripples in water

* pool:
  + background of beast moving off
  + adjust tentacle to not go off edge of screen
  + adjust x position of tentacle grab

* cavern:
  + slugs on ceiling drop
  + background of beast moving off ?
  + adjust slug attack range

* beast:
  + hook up beast ending cutscene
  + compress/transparency beast ending cutscene
  + add beast tripping

* rope_room:
  + re-enable earthquake while swinging
  + speed up background if possible


Level/Checkpoint #2:

* general
  + If aliens catch you, they punch you
  + Shields disappear if you leave the room
  + Alien AI
  + Gun sprites/action
  + Implement door
  + Implement end scene
  + Shoot the wire in the basement

* cage room:
  + in game, after some time the guard calms down

* Jail:
  + flashes from gunfire in neighboring room
  + Implement enemies
  + death animation
  + in actual game foreground enemies can continue to next screen

* Elevator:
  + Elevator can change direction mid-floor
  + Elevator should shoot sparks every 20 frames or so

* View:
  + music play when viewing city?

Level/Checkpoint #3:
 + Actual game shakes the camera when you hit the ground after falling

Level/Checkpoint #4:
 + Implement guard (shooting, taunting)
 + Disable keyboard while in the recharger

Level/Checkpoint #5:
 + Allow falling into first pit

Pictures/Ending
 + Show some pictures
 + Do ending
 + Play music?