I have posted an updated version of the level! It is recommended to get it if you have the older version, as it fixes some big things!
@sergio, thanks for pointing out those Voids! I tried my best to scour the level for such things, but I often have tunnel vision in certain areas. It's a problem when you're the only beta tester.
I took your advice and added something else there, rather than just close it off.
Also, I didn't really have that much trouble with the clouds, I was just pointing out that they can't really be used as openly as other cloud sets due to the restricted tile count. I.e. you can't really make large clouds with tops, but that didn't end up being an issue, really.
As for the sewer variation, I actually had most of that in place before the event started. (In fact, parts of it precede the Broken Bulwarks set). In preparation for the event, I added some of the Broken Bulwarks features to it to make it complete enough for use. As such, that tileset as well is free for anyone to use/edit.