RULES

GENERAL

• players spaceship loosing life when enemy touch bottom of the screen
• ship objects loosing life when hit by missile
• when no lives end game
• each hitting enemies ship increase point of missiles damage

Based on abstract class Ship

1. SPACESHIP

   • size 96x96
   • moving right left
   • small missle (1 dmg, fast), unlimited
   • special weapons - can gather them when catching bonuses
     • tripple missile, each one (1 dmg, fast), limited
     • rocket missile (5 dmg, slow), limited
   • special weapons cooldowns - spaceship overheat system
     • rocket cannot be launched often than one for 1.5sec
     • tripple missiles blocked while player have shooted over 20 missiles on screen

2. ENEMIES

   • enemies show up every randomely every 2-5 seconds
   • bonuses show up every 15 seconds
   • Types of enemies:
     • Falcon - 1 live, size 64x64, speed - medium,
     • Hawk - 3 lives, size 96x96, speed - fast,
     • Destroyer - 7 lives, size 128x128, speed - slow, shooting small missiles in random periods,

Additional classes objects

1. MISSILES
   • one class responsible for missiles and its behaviour
   • varying based on className
   • move correctly both for players spaceship and enemies shooting units

1. BONUSES
   • each 96x96 size
   • moving from top to bottom
   • collecting increase corresponding spaceship statistics or temporarily increase speed
   • types:
     • bonus live
     • bonus rockets
     • bonus tripple missile
     • bonus speed up

1. CONTROLLER
   • class responsible for controlling games progress - from start to losing and then starting next game
   • containts numbers of intervals which check missiles collision, enemies passing bottom, cleaning unneccesary objects and updating elements

1. EXTRA FEATURES
   • utilities.js module which stores as objects all commonly used data, objects properties values:
     • all commonly used data such as HTML classes, references to DOM objects
     • statistics of objects:
       • ships lives counts,
       • speed values,
       • bonus counts,
       • missiles damages
       • etc.
     • default time variables:
       • base period for generating enemies
       • period for generating bonuses
       • periods for enemy shooting unit shooting
       • special weapons cooldowns
     • object with corrections of hit box of objects (values used to adjust hit area to the part of html div actually filled with image)
     • function translating HTML naming ‘-‘ conventions class names to javascript camel convention
   • Generation of correct hit boxes of each collision-able object - used to trigger collision in moment which results in exploding missile in part of div taken by image
   • Animated ships, missiles and their explosions