qcookieclicker/qml/components/GameButton.qml

import QtQuick 2.9
import QtQuick.Controls 2.4

Button {
    id: control

    property string imageSrc: ""

    width: height

    scale: pressed ? 0.8:1

    background: Image {
        source: control.imageSrc
        mipmap: true
    }

    Behavior on scale {
        NumberAnimation {
            duration: 100
        }
    }
}