Moving up the complexity ladder a tad, I'm shooting for a Tetris-style falling blocks puzzle game. In actuality it's a bit more like Puyo Puyo than Tetris, but the falling pieces don't quite work the same, and the progression's going to work differently.
Anyway, to make this work as a foundation-builder for future products, Synergy is an OpenGL app instead of using Canvas (which is used for 2D graphics). So far this has worked out pretty well, and I've even been able to mix and match Android UI layout with the in-game assets without too much trouble. The game plays and looks pretty good at this point, though there's still some temp art to replace, and the title screen/settings/etc menus aren't done yet.
The biggest hurdles so far have mostly been getting a reasonable art path in place. As of a couple days ago I have a converter from OBJ to my custom (static) model format, so I can create models in blender, export them, then import them into Synergy. Texture coordinates, normals, etc all seem fine. Not bad!
The current needs-doing task is making proper models for the game pieces. I've got some roughed in now but haven't exported the models yet. Those should get in this weekend, then I'll hopefully move on to actual game progression (getting faster/more difficult as you get more matches).