Update README.md

Author: vtupulse

README.md

@@ -34,4 +34,5 @@
 #### [30. 2D Game Computer Graphics Project in OpenGL Source Code](https://www.vtupulse.com/cgv-mini-projects/2d-game-computer-graphics-project-in-opengl/)
 #### [31. Sorting algorithms (Selection, Insertion, Bubble and Ripple Sort) visualizer CG OpenGL Project](https://www.vtupulse.com/product/sorting-algorithms-visualizer-cg-opengl-project/)
 #### [32. Balloon Popper Game CG OpenGL Project](https://www.vtupulse.com/product/balloon-popper-game-cg-opengl-project/)
+#### [33. Visualization of rain water collection CG OpenGL Project](https://www.vtupulse.com/product/visualization-of-rain-water-collection-cg-opengl-project/)
 #### Will update soon