Well here are some hints for that room in case this thread gets moved. Like the other one, this one is pretty open and each high score demo so far seems to have a slightly different solution. Most of them have the following in common:
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×Stick to the corners as they are still the safest places. NW and SE seem to be the corners used in all the demos so far. Line up two kegs horizontally to form a barrier so that you only have to deal with roaches coming in from one direction. You can use hot tiles you your advantage here too. But the main thing is to block off roaches from the north or south then try to have the remaining roaches coming in horizontally in the same row. Even if they are not coming in lined up perfectly, there is usually some dancing around you can do to make things work out.
EDIT: Looks like you got it just before I posted! Yeah, both rooms will yield to a similar strategy.
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Links to neat forum tools that I always have trouble finding:
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[Last edited by Insoluble at 11-15-2015 09:16 PM : post colission]