In amongst all the glitchiness, a colour will sometimes appear. Whatever colour it is, a swarm of 50 grouped regen bloons of that colour will appear at the beginning. Also, all towers that are NOT the colour will take 10 HP and 5 grouped regen bloons of that tower's colour will spawn. The colours go from the easier bloons to the harder bloons, although not necesarilly in order of difficulty. After 10 waves of bloons, ??? will explode into millions of pieces, only to reform again.