On the water: Yeah I wanted it to be brown and muddy. I'll test it with a blue hint to help with the visual clues. I also want to try and add more "ripple" to the layer below to help obscure the objects on the ground.

@Sigurd - Yeah, I actually forgot about the "main" entrance. The players will be entering by way of the flooded room in the northeast. I'm planning on putting the collapsed entrance in front of the two statues at the south.

@Phantos - The grid size should be 50 px

Thanks everyone!