Originally Posted by Cyb3rGlitch
The volume controls on your device can control the slider.
Maybe this is obvious for people who've used Android for a while (i.e. other apps using it too), but the only reason I found out about the volume button is because I saw it in the changelog. I don't think I've seen it mentioned anywhere else (e.g. the tour/tutorial).
The way it's designed now having soft keys would at least be possible in landscape mode. You could also make the settings and night icons smaller, move down the tour and refresh icons and add soft +/- keys in both portrait and landscape.