Thanks! The current beta uses floating sticks in the lower part of the screen: left thumb moves, right thumb aims in four directions and shoots. I haven't completed a player comparison of different layouts yet. If you try 0.6.20, I'd be interested in whether the stick stays comfortable near the edges and whether your thumb hides an attack warning. If you're judging the preview only, that's useful too—just mention that so I can separate visual impressions from hands-on feedback.