(^) BonusLife "+1"
(+) main.c: isPaused for pause/resume
(*) should be in previous commit
(^) OBJ_NULL
(^) RockBig creation faster
(-) many bugs, TODO's
(^) spawn[] -> class[]
(+) BONUS_BOMB
(+) BONUS_FIRE
(^) BONUS_BOMB: 5 -> 3 (countdown)
(+) fps
(-) many harcoded numbers
(-) bug: uses of 'await ms' instead of 'SDL_DT'