water shader 2D

I don't know much about shader if someone could help

I am using this free 2d water asset it contains a water shader. I want to edit that shader so look more like 2.5d or 3d.

Currently, it looks like this


I want to make it look like




Adding a foam type thing on top and make it little reflective

shader used in the asset to make 2d water

Code (CSharp):

1.  
2.  
3. Shader "Water2D/Metaballs_Simple" {
4. Properties {  
5.     _MainTex ("Texture", 2D) = "white" { }  
6.     _Color ("Main color", Color) = (1,1,1,1)
7.     _Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
8.  
9.     _Stroke ("Stroke alpha", Range(0,1)) = 0.1
10.     _StrokeColor ("Stroke color", Color) = (1,1,1,1)
11.  
12. }
13. /// <summary>
14. /// Multiple metaball shader.
15.  
16. /// </summary>
17. SubShader {
18.     Tags {"Queue"="AlphaTest" "IgnoreProjector"="True" "RenderType"="TransparentCutout"}
19.     GrabPass{}
20.     Pass {
21.     Blend SrcAlpha OneMinusSrcAlpha  
22.   // Blend One One // Additive
23.   // Blend One OneMinusSrcAlpha
24.     CGPROGRAM
25.     #pragma vertex vert
26.     #pragma fragment frag  
27.     #include "UnityCG.cginc"  
28.     float4 _Color;
29.     sampler2D _MainTex;  
30.     fixed _Cutoff;
31.     fixed _Stroke;
32.     half4 _StrokeColor;
33.     float2 _screenPos;
34.  
35.  
36.  
37.     float4 _CameraDepthTexture_TexelSize;
38.  
39.  
40.     struct v2f {
41.         float4  pos : SV_POSITION;
42.         float2  uv : TEXCOORD0;
43.     };  
44.  
45.     float4 _MainTex_ST;      
46.     v2f vert (appdata_base v){
47.         v2f o;
48.         o.pos = UnityObjectToClipPos (v.vertex);
49.         o.uv = TRANSFORM_TEX (v.texcoord, _MainTex);
50.         return o;
51.     };
52.  
53.  
54.  
55.  
56.     half4 frag (v2f i) : COLOR{      
57.         half4 texcol= tex2D (_MainTex, i.uv);
58.         //half4 finalColor = texcol;
59.  
60.  
61.         clip(texcol.a - _Cutoff);
62.  
63.         if (texcol.a < _Stroke) {
64.             texcol = _StrokeColor;
65.         } else {
66.             texcol = _Color;
67.         }
68.                  
69.  
70.      
71.          return texcol;
72.        
73.      
74.     }
75.  
76.  
77.  
78.  
79.     ENDCG
80.  
81.     }
82. }
83. Fallback "VertexLit"
84. }