Level 39 (Lockdown)
20 balloons required to complete the level. Another level which depends as much on luck as skill. The easiest way to play it is to shoot almost directly upwards to just glance off the vertical rubber wall to the left of the screen. By glancing off the right side of this wall with plenty of power the darts will come down and pop most of the bloons on the other parts of the screen. If you have a dart left and most, if not all, of the group of six in the lower part of the screen are not hit you can aim almost directly at them and take out most of them that way.
Level 43 (D in the D)
32 balloons required to complete the level. With your first dart take out as many of the mines as you can using a regular arc shot. The next dart should be aimed slightly downwards to bounce within the rubber walls of the two parallel rubber walls on the left and clear as many as possible in that location. Next comes a shallow arc to try to get the bloons above the ice bloons. Finally a direct hit on the ice bloons should net you an additional four for your total.
Level 48 (The Matrix)
105 balloons required to complete the level. Again we welcome a level giving us a little respite and perhaps allow for more fun than skill. With the first shot take out the Pac-man closest to your monkey. Eat all the mine bloons and eventually your Pac-Man will fall down, but take out another Pac-Man on the way down. With this one eat the next Pac-Man, then eat your way through a few more bloons and finally head back to the top to eat the remaining mines. Having eaten the mines you should drop again onto yet another lower Pac-man who will then happily eat the remaining lower bloons.
Level 49 (Wrong Side)
70 balloons required to complete the level. The easiest way to complete this level is to glance off the top ice bloon so that you end up hitting a pin bloon. This will pop the top group and perhaps also the bottom one, depending if your luck is holding. If the bottom group does not end up popped then aim your next dart at the frozen bloons at the top so you get a bounce back to the lower group. You can add to your score by using any remaining darts to aim at any bloons left.