The monkeys have figured how to upgrade themselves without raising the price! When you place a monkey, it upgrades itself to a random upgrade. However, if a projectile hits a bloon, it will disappear. Sorry for slow attacking and towers going off. It's just a glitch.
Thanks to Tommy100 for the bloons and fuziionz_gaming for the overall game. Thanks to me also for the skins. https://scratch.mit.edu/projects/370260106/ <- updated ver. https://scratch.mit.edu/projects/294554831/ <- same game remixed from, way better than this