Steps look good but there is a line across the top. To fix that merge the layer to an empty layer beneath then erase the line. The water color looks a bit off unless it's magic water. Try something darker, bluer, and grayer. On the color picker move the slider up away from the green/aqua towards the blue then come across and move the little circle thingy towards the left where the grays are...put it somewhere in the middle or left of middle. Moving that lil circle up will make things lighter, down is darker. Lastly, depending on depth of the water the underlying texture can be seen - if the pool is deep then it won't be seen but if it is shallow then it will be seen - but murkiness also plays a part there. Murkiness makes the water gray or brown as well. Magic water can be any color you want.

~Double live and superfly