Frogger game in Ruby 2D

frogger.rb

require 'ruby2d'

GRID_SIZE = 40

# Set the window size
set width: GRID_SIZE * 12
set height: GRID_SIZE * 9

# Create a new shape
frogger = Square.new(
  x: GRID_SIZE * rand(12), y: GRID_SIZE * 8,
  size: GRID_SIZE,
  color: 'olive',
  z: 1
)

boats = []
trucks = []
game_state = :in_progress

Rectangle.new(x: 0, y: GRID_SIZE * 7, width: GRID_SIZE * 12, height: GRID_SIZE, color: 'blue')
Rectangle.new(x: 0, y: GRID_SIZE * 5, width: GRID_SIZE * 12, height: GRID_SIZE, color: 'gray')

on :key_down do |event|
  if game_state == :in_progress
    case event.key
    when 'left' then frogger.x -= GRID_SIZE
    when 'right' then frogger.x += GRID_SIZE
    when 'up' then frogger.y -= GRID_SIZE
    when 'down' then frogger.y += GRID_SIZE
    end
  end
end

update do
  if game_state == :lost
    @text ||= Text.new("whamp whamp whamp", x: 0, y: Window.height / 2, size: 72, color: 'red')
    Window.set(background: 'white')
  elsif game_state == :won
    @text ||= Text.new("🎉 !!! Home FREE !!! 🎉", x: 0, y: Window.height / 2, size: 72, color: 'random')
    Window.set(background: 'white')
  else
    if Window.frames % 180 == 1
      boats.push(Rectangle.new(x: -GRID_SIZE * 2, y: GRID_SIZE * 7, width: GRID_SIZE * 2, height: GRID_SIZE, color: 'red'))
    end

    if Window.frames % 240 == 1
      trucks.push(Rectangle.new(x: Window.width, y: GRID_SIZE * 5, width: GRID_SIZE * 3, height: GRID_SIZE, color: 'purple'))
    end

    boats.each { |boat| boat.x += 1}
    trucks.each { |truck| truck.x -= 0.8}

    if (boats + trucks).any? { |vehicle| vehicle.contains?(frogger.x + (frogger.width / 2), frogger.y + (frogger.height / 2)) }
      game_state = :lost
    elsif frogger.y == 0
      game_state = :won
    end

  end
end


# Show the window
show