Quick Defrost

 is the 2nd level in the Sneak Peaks zone in Bloons 2, and overall 38th level in the whole game.

Strategy
To win, first, hit the plane bloon. Then use the plane to pop the spike bloons. Then, you must hit the Bomb bloons because the regular ones are frozen. Timing is also important.

Alternately, snipe out the normal bloons at the bottom, hit the Ace Bloon, and then target the Ace at the Spiky Bloons.