I'm not sure how to thoroughly check, but anyways, I'm really preferring this to Phoebes tileset as the Phoebe one is a bit dark for my preferences.
Edit: Maybe you should try a playtest with the arena since I got this errorlog:
*** Error(s) found in the file "raw/objects/creature_subterranean.txt"
CAVE_SWALLOW_MAN:Unrecognized Creature Caste Body Token: 2ARMS
*** Error(s) finalizing the creature CRUNDLE
CRUNDLE:FEMALE:right horn, layer 1: Tissue HORN was not found, using first tissue instead
CRUNDLE:FEMALE:left horn, layer 1: Tissue HORN was not found, using first tissue instead
CRUNDLE:MALE:right horn, layer 1: Tissue HORN was not found, using first tissue instead
CRUNDLE:MALE:left horn, layer 1: Tissue HORN was not found, using first tissue instead
Edit: Somehow you omitted the 2ARMS token and the _FLIER tag.
Edit2: And you're missing the horn and teeth template for the crundles.
Edit3: Okay, I think you have several things messed up because I tried fixing those stuff in the raws and it still errorlogged, when I copied and pasted over from Phoebes pack, it now gives me this error:
*** Error(s) found in the file "raw/objects/creature_subterranean.txt"
CAVE_SWALLOW_MAN:Tissue layer not added because no BP found: BY_CATEGORY:TOE:TALON
CAVE_SWALLOW_MAN:Attack BITE seems to have correct format but could not find proper BPs in any caste, so not added
CAVE_SWALLOW_MAN:Attack SCRATCH seems to have correct format but could not find proper BPs in any caste, so not added
Edit4: I tried copying and pasting the body part and body plan raws and still got that message, copied and pasted ALL raws from Phoebus's pack and STILL got the error message. No idea whats messed up here.