The splash from the water goes the same direction in both worlds. This is not a bug, but a feature XD No, really, we did it on purpose ^^ In the infraworld, shadows and magic floating enemies don't flip, and the same thing happens with the magic/sacred water. We weren't sure of this one though, do you think it should be changed?
Well, the splash damages enemies, right? (It seemed to, but I'm not 100% sure) It's much more useful if it moves away from the ground rather than flying up into solid matter where it's not going to hit any enemies (plus that's just a bit weird-looking). From a story/gameworld perspective, I think it makes sense that since gravity is flipped the splash would also be flipped. It's also just more consistent because everything else from the upper world acts in the opposite way when in the other world (the player, the meat, the arc of the thrown bottles...).
Update: I gave the full version a try. The level design is much better. I didn't like the first boss battle. I know it's done for story purposes, but I would rather feel like I'm desperately fighting for my life rather than just getting slaughtered.
My only really major issue with the game is the main weapon. It's really annoying that my character can't throw the bottle forward at bats or spiders that are right in front of him. I ended up with about five bats chasing me through level 2 because they were close enough that I couldn't hit them with the water and I couldn't stop moving forward because then they'd hit me. It was terrible and I ended up rage-quitting after dying to a spider or something with that huge cluster of bats on my tail.
If you don't want to let players control their throwing arc at all, then I'd recommend changing how bats behave. Maybe they could fly up high and dive-bomb you at a shallow angle, or above until they're almost over you and then down. Both of those movement styles would give players a little more opportunity to hit them. Personally, though, I think just making the throwing have a lower arc (or just having it start closer to horizontal) would improve things a lot.
I like the graphics of level 2. It actually makes me think level 1's graphics could use a little more detail. The enemy variety is nice. I thought the spiders on the ground were skunks for a while, though, because their tails are bright and their legs don't stand out at all. I didn't like that they were always popping out of holes right in front of me, but maybe that would be fine if I didn't have bats right behind me and could dodge more easily.
I'm not a fan of the music (It's the sounds used. The tunes are fine), but at least it's not as repetitive as before.
For the most part, the game feels a lot better. I think it would be nice to have some options, like a full-screen toggle, volume sliders, etc.
I find that pressing Escape to quit can be a bit of a problem in games. A lot of the time, if I suddenly have to pause for whatever reason, I'll hit Escape automatically. In this game, I'd lose all my progress. Some sort of confirmation pop-up might be good, and an actual menu would be better. On a related note, I really hope you plan on saving the player's progress. Just being able to start from the level I ended at would be nice. Personally, I think it might be better for sales as well. Games feel shorter when I finish them in one session rather than spreading things out over the course of a few days.