When I was in my second year of my current studies we had to create a game inside Unity. Unity is a game engine, where you throw in 3d objects and let them interact with each other. Since this was my first game I wanted to keep it simple.
I started modeling the island first and created the windmill next along with some small assets. There is a fence, a little box and grass to which is all made in Maya. I then textured everything and imported it into Unity. The clouds you see in the level are just sprites being emitted into the scene. The tree I created with the Unity tree creator. I think I spent around 6 weeks creating this... When you learn it all starts out slow.
Did you reckognize the reference?
Of course you did, I got my inspiration from the Gorillaz video clip. Feel Good Inc. (@ 2:36)
https://youtu.be/HyHNuVaZJ-k?t=156
I should really recreate a visual effects version of this with my current skills.
I don't remember what grade I got :)