Here's my entry. Press W for the Winter Entry. Press S for the Spring Entry. Press M for the Summer Entry. Press A for the Autumn Entry. The Autumn Entry was the first one I made.
@sara3422 for the lineart. Ver-1: finished the coloring Ver-1.5: added shading Ver-2: added other entries, like winter, summer and spring Ver-3: Added button and menu Ver-4: Fixed some bugs