expiring bullets

main.lua

@@ -32,12 +32,18 @@ function love.update(dt)
     shipX = (shipX + shipSpeedX * dt) % arenaWidth
     shipY = (shipY + shipSpeedY * dt) % arenaHeight
 
-    for bulletIndex, bullet in ipairs(bullets) do
+    for bulletIndex = #bullets, 1, -1 do
+        local bullet = bullets[bulletIndex]
+        bullet.timeLeft = bullet.timeLeft - dt
+        if bullet.timeLeft <= 0 then
+            table.remove(bullets, bulletIndex)
+        else
             local bulletSpeed = 500
             bullet.x = (bullet.x + math.cos(bullet.angle) * bulletSpeed * dt) % arenaWidth
             bullet.y = (bullet.y + math.sin(bullet.angle) * bulletSpeed * dt) % arenaHeight
         end
     end
+end
 
 function love.keypressed(key)
     if key == 's' then
@@ -45,6 +51,7 @@ function love.keypressed(key)
             x = shipX + math.cos(shipAngle) * shipRadius,
             y = shipY + math.sin(shipAngle) * shipRadius,
             angle = shipAngle,
+            timeLeft = 4,
         })
     end
 end