I find createentity a bit unpredictable, I've used createentity(x,y,21,18,0) in my level to test it, and I got a terminal. Then I made a new level in which I tested it one by one, but this time, the
exact same command, createentity(x,y,21,18,0), produced a white enemy sprite like you see in Linear Collider!

WTH? 20 also created such a thing, but you could activate it if you touch it as if it was a terminal. Also, entity ID 10 created a CD thing like you see in Security Swoop or something like that, and 18 and 24 are gray crewmates instead of cyan.
11=horizontal gravity line
12=vertical gravity line
22=should be trinket, but only shows up if you collect a trinket in that room without leaving it (used when

gives you a trinket in the ship, it is the only createentity command used in the game)
25=you have to use the metadata to change the created sprite, so createentity(x,y,25,M,0)
0=top cup holder
1=bottom cup holder
2=cup
3=flipped cup
4=crewmate cup
5=flipped crewmate cup
6=sad crewmate cup
7=flipped sad crewmate cup
8=trinket cup
9=flipped trinket cup
10=nothing?
11=nothing?
12=square
13=1/4th of a disappearing platform frame 1
14=frame 2
15=frame 3
16=another square
17=another square
18=another square (when I first tested it it was a V???)
19=square
20=square
(I don't know if it goes further than 20)
And it does go above 27, actually, 27-50 are all glitched

's at the top of the screen, 51-54 is nothing?, 55 is a rescuable crewmate, where you have to use metadata 2 for the colours, createentity(x,y,55,0,M):
0=

1=

2=

3=

4=

5=

6=

7=

8=

9=

…
56 is an enemy, and 57, 58 and 59 are glitched

's. After that I stopped.
Now, can
someone please tell me why a lot of entities are

at the top of the screen, standing still until you move, then it starts to slide in the direction you walked to, and if you go further in that direction, it moves faster. If you walk in the opposite direction,

at the top of the screen slows down. As if the normal

is a joystick!