Descending Red/Green Pipe Bug (Zeb/Zebbo) ASM

[Meowmaritus]

(Hosting here for resource)

Makes red/green pipe bugs descend from the ceiling when Properties 2 (Speed 2 in SMILE) is set to anything other than 0 (it also adds +0x30 units of vertical trigger distance in this case because ceilings are high, but this height is adjustable in the file).

Note: I have not checked vanilla game for if any red/green pipe bugs erroneously have this property set to anything other than zero. If they did, they will be basically nonfunctional until the value is changed (hopefully they have the value 0 on all of them).