E3 2014 Mario Maker - PIRANHA PLANTS

The most purely wonderful thing at E3 not called No Man's Sky or Batman falling off a building, Mario Maker lets players build their own 8-bit Super Mario Bros levels. As a design tool Mario Maker looks pretty straightforward, using the touchscreen on the Wii U gamepad for some dragging and dropping. This trailer shows off player designed levels overstuffed with enemies in easy, point hoarding positions. Presumably it'll be equally easy for sadists to design their own impossible, Shobon Action style nightmares.