Blue Laser is an intermediate difficulty track in Bloons TD 4. It is a Premium Track that requires 15 to buy. The NinjaKiwi description of this track calls it "Space Age Track". The track is relatively long but the reason it isn't as easy as it looks is because bloons come from both sides. The track is almost symetrical so if you use a good strategy use it on both sides. If there was more space to place towers, this track would be quite easy. However, there isn't much space, so make the best of the space you have. It is still pretty easy, though. However, In the iOS Bloons TD 4, this track costs nothing to get.