My First MicroStudio Game Project

Diamond Chase

init = function()
  player = object
    x = 0
    y = 0
    speed = 2
    width = 50
    height = 50
    sprite = "ghost"
  end
  
  diamond = object
    x = 40
    y = 40
    width = 30
    height = 30
    sprite = "diamond"
  end
  
  score = 0
  timer = 100
  gameover = false
end

update = function()
  if timer <= 0 then 
    gameover = true
  else
    timer -= 1/60
    movements()
    avoidVoid()
    
   if collision() then
      audio.playSound("collect", .2)
      score = score + 1
     changeDiamondPosition()
   end
  end
end

draw = function()
  screen.clear()
  screen.fillRect(0, 0, screen.width, screen.height, "rgb(10, 10, 18)")
  screen.drawSprite(player.sprite, player.x, player.y, player.width, player.height)
  screen.drawSprite(diamond.sprite, diamond.x, diamond.y, diamond.width, diamond.height)

  screen.drawText("Time: " + ceil(timer), 135, 85, 20, "rgb(130, 139, 190)")
  screen.drawText("Score: " + ceil(score), -135, 85, 20, "rgb(130, 139, 190)")

  if gameover then
    screen.fillRect(0, 0, screen.width, screen.height, "rgb(150, 0, 0, 0.5)")
    screen.drawText("GAME OVER", 0, 0, 50, "rgb(255, 255, 255)")
  end
end

movements = function()
  if keyboard.A or keyboard.LEFT then
    player.x = player.x - 1
  end
  if keyboard.D or keyboard.RIGHT then
    player.x = player.x + 1
  end
  if keyboard.W or keyboard.UP then
    player.y = player.y + 1
  end
  if keyboard.S or keyboard.DOWN then
    player.y = player.y - 1
  end
end

collision = function()
  x_distance = abs(player.x - diamond.x)
  y_distance = abs(player.y - diamond.y)
  
  if x_distance <= 18 and y_distance <= 18 then
    return true
  else
    return false
  end
end

changeDiamondPosition = function()
  diamond.x = random.next() * 170 * positiveOrNegative()
  diamond.y = random.next() * 90 * positiveOrNegative()
end

positiveOrNegative = function()
  if random.next() < .5 then
    return 1
  else
    return -1
  end
end

clamp = function(value, lower_limit, upper_limit)
  local val = max(value, lower_limit)
  val = min(val, upper_limit)
  return val
end

avoidVoid = function()
  player.x = clamp(player.x, -163, 163)
  player.y = clamp(player.y, -80, 83)
end