Like the game, the art and the atmosphere.
Found a couple of bug, like being able to climb straight wall with repetitive wall jumping and moving unmovable rock by repeatedly running into it. But nothing that broke the experience for me.
One thing I didn't like was not being able to see spikes before jumping in a hole. It felt unfair to the player, might want to consider this in your level design.
But even with all this, good game!!!