Drag and drop then animation for going back (Jetpack compose 1.0.0-alpha07) : Thank you Joost Klitsie for your help on the Slack channel :)

DragAndDropWithAnimation.kt

@Preview
@Composable
fun DragAndDropComponent() {
    Column(modifier = Modifier.size(300.dp).background(Color.Red)) {
        val x = animatedFloat(150f)
        val y = animatedFloat(150f)
        val bouncySpring = SpringSpec(
            dampingRatio = DampingRatioMediumBouncy,
            stiffness = StiffnessLow,
            visibilityThreshold = DefaultDisplacementThreshold)
        val stiffSpring = SpringSpec(
            dampingRatio = DampingRatioLowBouncy,
            stiffness = StiffnessHigh,
            visibilityThreshold = DefaultDisplacementThreshold)
        Box(modifier = Modifier
            .offset(
                with(DensityAmbient.current) { x.value.toDp() },
                with(DensityAmbient.current) { y.value.toDp() })
            .size(10.dp)
            .background(Color.Blue)
            .dragGestureFilter(
                object : DragObserver {
                    override fun onDrag(dragDistance: Offset): Offset {
                        x.animateTo(
                            targetValue = x.targetValue + dragDistance.x,
                            anim = stiffSpring
                        )
                        y.animateTo(
                            targetValue = y.targetValue + dragDistance.y,
                            anim = stiffSpring
                        )
                        return super.onDrag(dragDistance)
                    }
                    override fun onStop(velocity: Offset) {
                        super.onStop(velocity)
                        reset()
                    }
                    override fun onCancel() {
                        super.onCancel()
                        reset()
                    }
                    private fun reset() {
                        x.animateTo(
                            targetValue = 150f,
                            anim = bouncySpring)
                        y.animateTo(
                            targetValue = 150f,
                            anim = bouncySpring)
                    }
                },
                startDragImmediately = true
            )
        )
    }
}