Add some (badly) generated platforms that will scroll

down whenever the player's top side depasses the middle
of the screen.
WiP.

CMakeLists.txt

@@ -54,6 +54,7 @@ add_executable(${PROJECT_NAME}
 	src/sizenotifiable.cpp
 	src/platform.cpp
 	src/platformsystem.cpp
+	src/movers/moverworld.cpp
 )
 
 target_link_libraries(${PROJECT_NAME}