yes you can, just instead of tapping/touching the icons, tap and keep touching it (Long press) for 2-3 seconds, your phone will vibrate and a trashcan will appear at the bottom, drag the icon/widget to the bottom
if you want to add a new icon just open the "app drawer" -> long press on an app and drag it to anywhere on the screen where you want to place it
or on the homescree press MENU -> add -> widget -> and select the widget that you want to add
timescape will drain your battery pretty fast, you should trash the widget, you can always readd it later on
