My only two crits have already been mentioned, tiny bit more detail in the stone and the water looks a bit too smooth and pillow shaded.
Really like how smooth the lighting is though, good choice of shades for that!
excellent. my only criticism would be the water having too soft colors.
Fantastic perspective, definitely the eyecatcher of this piece. However, imho I think there is a lot left to do in regards to adding some textures and little details (cracks in the rock and all that jazz) to make the stalagmites n stuff read more as rock. Looks very nice though, looking forward to your next piece!
Texture goals