play button to start game
use font and regenerate on resume to workaround libgdx bug. also pass difficulty level through from menu
fix problems with singletons referencing world/renderer
tap to fire instead of fling up to fire
fix boss bomb speed?
add font file
activity_main layout
text added to initial screen
use unispace font on initial screen
difficulty level menu layout file
notes and debug logs in GameActivity
preparations for saving/restoring game state
Renderer singleton stuff
useless key stuff, and GameScreen cleans up after itself
fix Bonus extra hitpoints bug?
local high score saving and also return to main screen on game finish
show final score with a Toast message
res/values
high score view and main view cleanup
initial GamePreferences backend