If you tap on any Truffel either on the map or in the Following/For You section of the screen, you will have the ability to interact with it! 

Tap the heart or double tap the screen to “like” a Truffel, tap the speech bubble to comment on a Truffel, or you can also pin a Truffle to view it later in your pinned tab in your profile. 

You can also wave to the creator of a Truffel while viewing it at its location. To wave, tap the “Wave to” button on the screen when viewing a Truffel. 

Tapping on the three dots will allow you to add a Truffel to a list, set a Truffel as your Golden Truffle (to feature it on your profile), share, navigate to, or report a Truffel. 

You can find more information on controlling your experiemce in Truffel here.