I want to take credit for a balloon that I launched. Can I?

Yes, absolutely. You can take credit for a balloon during the Done stage. On the balloons that you launched, you will see a person/link icon. Click on that icon and your name will appear. That means that you have claimed that balloon and others see your name linked with that balloon - this act doesn’t change the anonymity on your other balloons.

Also, see our tutorial on Exploring and Claiming Balloons.