proto2dSystem, hudSystem process during onRender
update *.pack to define wall_material
add state machine to "cube"
avoid error, when trigger "ga" in dev
fix: collision drone vs cube processed twice (on 2 frames)
hack: add some elastic collision with wall to allow escape
dissolve drone on crash
change sky/clear color
disable debug-canvas, and enable audio GUI
fix bug in the cube animation (due to unsync between system run update/render)
restore mobile wall in beta1
restore gate_out (display + physic)
restore display of gate_in
clean import