I've been enjoying one debug function nobody's really been talking about yet. It shows the hitboxes for enemies and destructible objects in a brilliant cyan. I think we could use it to discover some secrets that might not be plainly visible. For example, the arches/ natural bridges in stage 1 have as many as 6 patches that are flagged, but the bouncing boulders don't show. I'm curious. The mushrooms at the first boss encounter are all targetable. Also, that first boss encounter... the worm has a few dozen short legs along the edges. Anyways, this is becoming my preferred way to play. To access it by keyboard it is S3, U(User), (T) TglDiplay, and the top option (C). I don't know what the option is actually called since it is offscreen via composite. The other option in this category is the "Mdl BBox" which shows red boxes around all the objects.