I like it a lot! The atmosphere is really cool, and the art style looks neat.
I had a few technical hiccups here and there, especially in the part with the barred wall and the large monster jar. Right after crashing it, the framerate dropped dramatically, and it didn't really improve for the rest of the playthrough. It also affected the character controls and the pushing mechanic. I had to use some dirty physics tricks to make it through the wall - even though the red planks were destroyed, they remained in front of it, so I had to push them away, which took a while. Being able to climb onto them would've been helpful.
Also, the AI of the monsters break in the first area, if you have them chase you down and then climb onto the low platform, wait a few seconds, and drop back on the ground.
Overall, though, I really had fun playing it.