I'll start of a note for, um, Leus probably? Whoever made the first part. A Hurt event causes damage only if a player touches it from above (stands on it) or is stuck inside of it. Anyway it's useless to put it on wall/ceiling spikes, as it's going to have no effect. Use the Bees event instead (I fixed that already, because I believe it was actually meant to hurt the player, sorry for an interference though).
Yeah I didn't know about that, thanks for fixing it for me.

Another edit of the existing part I made is fixing the masking (sorry, it annoyed me as hell). However, looks like in the newest part it was done without much thought again. Hell, people check the mask before saying "my work's done, everything's okay, cool".
What's wrong with the masking? Looks fine to me.

Let's take a step back, the Toaster PU. Still Leus I suppose? In the first version it was already possible to take with use of Bouncers, after the latest edit it's even easier, and I'm still not sure if that was even intended (and I guess not).
Yes it was intended to be able to be gotten with the bouncers.

Not sure who added the spike-filled part below, but it's made in an annoying manner as the Hurt event is placed on slopes, so you can just run at it (and that's also where the aforementioned poor masking is). I don't care, it's not like I want to say it's bad, won't interfere with your style, but I'd recommend considering doing something with it, especially since the spikes are invisible on low detail.
Again, I don't see what's wrong with the masking, but I didn't realize they were invisible on low-res sorry about that, I don't mind if someone does something else with it I'm not attached to that part. I just realized after the last edit with the spikey room above that I had not included enough difficulty, so I tried to kick it up a notch. Hence, if you jump too carelessly over the spikes you'll jump up through the ceiling and have to try again. But if you think there's a more efficient way to do this then feel free, or else I'll try and make it better when it's my turn again.

The pipe part is bothering me too, but I'll ignore it, just take some notes: Lori can get through some of the pipes and, if it matters, in regular JJ2 (without +) Spaz often gets stuck in a wall at one spot next to the crate. Oh, also would be nice if you didn't use trigger 31, it's the only one that can be used by non-MCE trigger crate generators. I don't expect we're going to need to use any, but it's better to save such a possibility when it doesn't cost anything.
Okay, we don't need to use trigger 31 I didn't even designate anything for it to do, I thought I'd leave that up to someone else. And the pipes are meant to be able to be gotten through at certain points (only while running as far as I can tell), so I guess if different characters have different abilities that just makes the level more interesting IMO.

Also, the fact that the size is currently set to 256x64 doesn't mean that we have to stick with it. Furthermore, I'd say it even should be larger, as it's a group project, and uploading a level of the default size would be considered a total joke. This means that you don't have to save space nor add rather weird invisible sucker tubes at the bottom of the level. I don't get at all what is it for.
Yeah, whatever, we can change the size and remove the suckers I don't care. I just thought that'd be a penalty for falling and failing to make it into the pipe area, maybe just leading you to a different section of the level.

And the last thing, I'd be thankful if you upload levels with a version number after the filename, to keep it clean. Please. Possibly in the form of "lmal_v03" (if it's the 3rd edit), but any other way would be okay with me.
Good idea.

Btw, in my turn I tried to start to use the text strings section for such notes like these, but it seems that there's too much of them to fit in there, and it's not the best way of communication anyway, that's why I post here. I recommend using text strings for fun purposes then, it'll look much more professional.
Yeah posting here is good. I tried to use the text strings to respond about the Toaster powerup too, but I guess it didn't get saved for some reason. My "WHAT HAPPENS NEXT" text strings are just intended to maybe somehow inspire the level makers for the next segment haha.

Thanks for the feedback, like I said I'm really enjoying this project and can't wait to see how it'll turn out.