Simple game made with Ruby-Processing

drop.rb

# Drop

class Player
  
  attr_accessor :health, :x, :y, :width, :height
  
  def initialize(args = {})
    args.each_pair {|k, v| send "#{k}=", v}
  end
  
  def check_health
    @health = 0 if @health < 0
    @health = 100 if @health > 100
    if @health == 0
      exit
    end
  end

  def check_level
    $GAME.level = ($GAME.score + 1 / 5) + 1
  end
  
  def absorb(droplet)
    if droplet.type == :good
      @health += 5
      $GAME.score += 1
    elsif droplet.type == :bad
      @health -= 20
    end
    check_health
    check_level
    droplet.reset
  end
  
  def collide(droplet)
    @y > droplet.y - droplet.height && @y < droplet.y + droplet.height && @x > droplet.x - droplet.width && @x < droplet.x + droplet.width
  end
  
end

class Droplet
  
  attr_accessor :type, :x, :y, :width, :height, :speed
  
  def initialize(args = {})
    args.each_pair {|k, v| send "#{k}=", v}
    reset
  end
  
  def reset
    @height = 20
    @width = 20
    @y = -@height
    @x = rand($GAME.width)
    @type = $droplet_types[rand($droplet_types.length)]
    @speed = rand(30) / 10.0 + 1
    self
  end
  
end

class Drop < Processing::App
  
  attr_accessor :level, :score

  def setup
    size(400, 400)
    @player = Player.new :health => 100, :x => 100, :y => 100, :width => 20, :height => 20
    @droplets = []
    $droplet_types = [:good, :bad]
    @colors = {
      :good => [100, 100, 255],
      :bad => [255, 100, 100],
      :hit => [100, 255, 100]
    }
    $GAME = self
    @level = 1
    @score = 0
  end
  
  def draw
    fill 0
    no_stroke
    rect 0, 0, @height, @width
    fill 127
    @droplets << Droplet.new if rand(100) == 0 && @droplets.length < @level * 5
    @player.x -= (@player.x - mouse_x) / 10
    @player.y -= (@player.y - mouse_y) / 10
    rect @player.x - @player.width / 2, @player.y - @player.height / 2, @player.width, @player.height
    @droplets.each do |d|
      d.y += d.speed
      d.reset if d.y - d.height / 2 > height
      @player.absorb(d) if @player.collide(d)
      fill *@colors[d.type]
      rect d.x - d.width / 2, d.y - d.height / 2, d.width, d.height
    end
    no_fill
    stroke 128
    rect 20, 20, 20, 100
    fill 255
    rect 20, 120 - @player.health, 20, @player.health
  end
  
end

Drop.new :title => "Drop"