In each song, the denser the section is, more bloons will come out in that section. And in each section, the stronger the beat, then the stronger the bloon will be. Then how can we beat it if a song has a very strong beat at the start and spawn a ZOMG there when we just have a Dart Monkey, you say? Don't worry, there's a cap that's constantly increasing as the song progress. For example: at the start, the cap is at Red Bloon and 1 bloon/s, that means no matter how dense and how strong the beat is, there'll only be a maximum of 1 bloon coming out each second and the strongest bloon is just the Red Bloon.