Some people wonder where the Emoji button is in PadKeys. The answer is it doesn't have one! There are literally dozens of custom keyboards in the App Store specializing in Emoji, Gifs, and other fun ways to express yourself. Not that PadKeys isn't fun, but our specialities lie elsewhere and we'd rather spend our resources improving typing for ordinary text, than trying to out-emoji the emoji experts.
But all is not lost. We recommend you pick an emoji keyboard you like (from a third party or Apple's built-in one works well for many people) and add it to your keyboard list in Settings | General | Keyboard | Keyboards. Then accessing emoji can be just a single tap of the Globe key away from PadKeys, and just a single tap of "ABC" will bring you back.