add title screen images
load and draw the title screen image
add panel background images
assign panel backgrounds
add a Messages panel dedicated to puzzle phases only. Also turn off message queueing.
add a MessageSprite option to draw borders
remove message borders and make their backgrounds transparent
add a model property "isplaying" to indicate a game in progress, or game over
show the reinforcements message only if the game is not yet over
set puzzle panel hide position to the lower right
todo update
tweak arcade counter position
add messages and info backgrounds
add background images for panels
load panels backgrounds, and always draw the main image underneath everything
clear panels with black since we use background images
draw the firing solution on the arcade panel instead directly on the main image (it gets overdrawn by the panels otherwise)
add an earth image
draw earth somewhere on the starmap
clear messages when entering the menu state