One of the games featured at the Sense of Wonder Night, a showcase for indie games at the Tokyo Games Festival, Nanosmiles is a 16-level little arena shmup with interesting gameplay and control scheme.
Your ship has no weapons; instead, on each level there are a number of subordinate ships you can take over by moving into them, beginning near your initial position. You move with the arrow keys, and the subordinates move with you, circling you when idle. Holding down the Z key (also used for select in menus) sends a radar ping out from your command ship, and when it intersects an enemy, your subordinates converge on and destroy it.
The kicker is that a single hit on your command ship kills it, so you're often maneuvering to get out of the way of enemy fire, while trying to retain radar contact with the enemy so your subordinates continue to shoot it. A hit on a subordinate turns it grey (uncontrolled) rather than killing it, meaning you can regain control by moving back through it, but this may be awkward if there are active enemies nearby.
Initial levels are pretty easy, but the difficulty ramps up quickly -- the final level in particular is a bear.
A nice, responsive little game.