Replaced the help screen placeholder with an image by Daniel Garcia. This file is dual licensed on GPLv3 and Attribution-ShareAlike CC BY-SA.
Remapped restart to select button
Updated help.

Help messages now reflect remapping of reset from alt/y to space/select
Cleaned up wall-drawing.

Moved all wall graphics into one file and renamed variables to make sense.
This also fix bad looking brick with no border in editor.
Added missing animations.

Added animations for "dublicate" and "switch type" bricks.