player can shoot bullets,
bullets working, on collision disappear,
asteroid damaging,
entity delete bugfix,
colldet object removal,
clean colldet trash after colldet update,
hgignore update
main func renamed from game_run to game-run,
display game name, author and copyright info in game window,
player startpoint(s) setting from level data,
collision detection freq increased,
game entities parameters tweaking,
simple HUD,
player firing fixes,
fire at (and destroy) asteroids for points