How Can I Collect Bugs?

In order to collect the bugs in Tunnel Town, all you have to do is touch the bug on your screen, it will make a sound effect (provided your sound effects are turned on), you will see a puff of dust and the bug you tapped will disappear. You can view the bugs you have collected by touching the bug icon on the left side of the screen. You'll need to look far and wide all over the layers of earth to find different bugs. Some of them are rare, so keep your eyes out for those, you might even earn an achievement by catching enough bugs!