The audio is so terribly abrasive. The mechanics feel sluggish and horrible. You barely move up the wall. It just feels bad. There's no player empowerment to make it fun.
The graphics are horrible. I'm a huge fan of pixel and voxel art styled games. But this was just ugly.
Also it's buggy. You use space to hold on or whatever but also space to restart when you die. So a few quick deaths and it bugs out. It played with the restart menu still up. Then just froze.
Also it was one of those games where the NG page stays completely blank while it's loading and then right as I click refresh it suddenly appears. I doubt that's your fault. But it was your choice to use Unity and there are different ways to compile projects and have the data stream and you chose one where it has to cache the entire file before the applet will even appear.
I didn't like your game, the first Abyss, that much but it was the exact same game here except far better in every way. At least, for sure, the handling was way better and the character was smaller relative to the field. Two factors that really hurt Abyss 2.5.
I liked Flip World more than either of these, though it wasn't without its slew of issues that should have been obvious to the programmer.