I got this effect in one of my games. Look here: . If you touch the heart a white number appears and fades/flys off.
I do this with a sprite font with two behaviors (sine and fade). I spawn the font and activate that it is flying up with vertical sine behavior and at the same time I start the fading. The fading also destroys the object when finished. You just need to adjust the times so the fade finishes before the sine behavior woud let move it down again.