In Gun Builder, you get to be a super cool inventor! You have a giant toolbox filled with colorful parts to create your own awesome guns. You can choose different bodies, barrels, and funny attachments like a rubber chicken or sparkly wheels! Once you build it, you can test it out in silly challenges where you pop colorful balloons and hit funny targets. The best part? You can save your creations and show them to your friends, or even challenge them to build something cooler! It’s like playing with blocks but way more exciting and full of surprises!