Hi, thanks for playing and for your message!
The CD audio indeed doesn't loops. You can check Earok's Super Star Wars Holiday CD32, it has the same limitation (and it's a port by the creator of the engine himself). I'd say that it's a hard limit. But, I remember that I did the following "hack": I edited some songs, doing a copy and paste of its whole length at the ending, so it simulated at least one loop. The drawback is that the ISO gets bigger, and our hosting space here is limited. So, this is mostly used on very long stages (such as stage 5). But, I may do the extreme looping like 3 or 4 repeats with total disregard to the ISO sizes and Itch.io hosting space. At the moment it's the only shot we got.
About the ladders and the animation, I always remember that Wayne's World movie scene with the guitar shop and the poster pinned in the way where it reads "NO starway to heaven". I mean, I gotta pin a poster here "no reports of ladder animation"! :) The whole ladder is actually a bit of a hack on top of engine's "slope" physics (ie a thing that wasn't meant to be used that way). It may improve for v1.0 (we're at v0.9), but you will ALWAYS be able to moonwalk or do other funky moves there! Bottom line: you can moonwalk on SNES Super Castlevania too, and I'm sure that it was not done by just one programmer like me on his spare time. ;)
Watched the clip from your stream, that's very interesting. It didn't freeze, technically speaking, the camera just lost focus on the player character and wandered all the way to the left (for no reason). This happened once on the same place and you can see a screenshot of the exact same place and issue taken by Jimmie.s80@gmail.com a few comments below, 7 days ago. I issued a hotfix for that and it never happened again. But I'll check that spot again, thank you very much for reporting! I was a bit overwhelmed by the massive issue of CD music that refuses completely to play, which was completely unexpected so I put a lot of effort attempting to solve it (which fortunately seems to play correctly for you as far as I saw in your clip) and so I didn't had time yet to check more closely that fateful spot on world2.
Thanks for your detailed report and have a great Sunday!