I want to create a fun app or game that is enjoyed by the old and the young

I am more inclined towards Computer Graphics and Game Development. where I am learning WebGL. I have already worked with Blender, Maya and Cinema 4D and writing a program for generating a similar scene in WebGL is very interesting. I am getting to apply the concepts of Physics and Geometry to create a scene in WebGL. I have worked on 5 WebGL projects , where I have applied concepts of line and circle drawing algorithms (Bresenham), creating 3D mesh objects using triangles and adding texture, Animation, adding camera and light (ambient, diffuse and specular), working with matrices, writing shaders and passing uniform and varying variables, shadows, reflection, refraction, ray tracing. Learning these concepts have encouraged me to learn more concepts and making a game using my knowledge and skills is my dream. I have enrolled in Game Design and Development Specialization course Kindly reply me soon so we have a good discussion on this. Thank you