Ah... that reminds me, you can still walk through on diagonal ones, for what it's worth/if it wasn't already known.* Don't know if it's a redshift+extra speed specific (or maybe slight lag/chug/etc.?) thing or not, but it's a thing that's doable. Can also use those respawning blocks to phase through other blocks, ehehe. Neat stuff, probably engine quirks and known ones, but just in case, etc., etc.
*Like, if there's something likewhere the _ is empty and the # is blocks (those black indestructable ones, missile breakable, it seems to be just kinda' whatever), you can push your way from one _ to the other. Some (most?) weapons can get shots through those non-spaces, too, heh, if you angle it right or shove your face into it, first. Balance wise it's actually somewhat of an issue for a few rooms (iirc, those ones with... blocked in rectangles split by the debris blocks, with each wing filled with lots of those little ships? That's on both the top and bottom sides of the room. As an example.), since you can sidle up to a corner and just kinda' murder everything on the other side from more or less absolute safety, heh.