Android Features and Design
Most important is a Rapid Task Entry Widget (in addition a fairly customizable list widget should be there). Very appreciated would be dragging and droping a Task (into a folder or sth else) and keep the Properties as a Menu-Point for the Hardwarebutton (or customizable Behaviour in Settings with Touch Delays). Otherwise the MLO- Mainfeature (hierarchical Organization) isn't fully availible for Android, that would be a pity.
Another Thing is integration in Agenda Widget or other Stuff. Perhaps these Developers can be offered a little API for extracting list Information from the MLO Data.
The Design looks promising (i like the Green), perhaps it can be a little bit more embedded in the Android Standard Design in Terms of Iconsize. Also a Text-Mode with very small Lines for viewing larger Lists could make sense (sth like a Browser Zoom).
Overall, keeping focus on the core functionality isn't that bad ;) You're doing great work, for sure.