Level II 1S1E:
Hmm, there's probably a reason there's a staircase there...
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×Ignore this for now - you are correct, it is inaccessible from the west side.
Level II 2S1W:
As you've likely discovered, the puzzle of this room is figuring out how to get the roach in the big grid out. To do this, you have three tools:
1. The orb at top right through the tunnel. This has no time limit on its use.
2. The orb at bottom middle. This can be struck once, and then you must strike it again and leave, or a roach will get stuck in the force arrow trap.
3. The orb at bottom right. Similar to orb 2 but with a longer time limit, and further to the right.
Hopefully, with some experimentation, the order in which you should use these should become clear.
Luckily for you, after solving this room, there's a choice of whether you want to do 2S2W right away or not.
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Quick links to my stuff (in case you forgot where it was):
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