Unfortunately, the Bloons Tower Defense Series ran on flash. As you may know, games haven’t been able to run on Flash since 2020. We know that that was the most beloved tower defense game on Coolmath, and we hope to eventually get them back up on Coolmath Games. Until then, we have a ton of other games on the playlist to check out. Who knows, maybe you will end up finding another game that you love even more than the Bloons Tower Defense series.