Everything outside of that known bug felt like a fairly decent core, but "sometimes" getting stuck in walls seems like a heavy underestimation to me. The moment you hit 26+ souls, every single wall is now a near-immediate softlock due to the collision mismatch of front and back. Touching a wall at that size means turning around (including via walljump, your only way to climb!) will clip your abdomen into that wall and pin you there until you restart the entire game, every time without fail.
I was curious if there was a larger size, but the best routing i've managed so far is 40 souls before i'm unable to move anywhere else w/o softlocking, and only 32 can be carried to the game-ending NPC. Overall, liked what I saw.