Acquire held a blogger demo event for PlayStation Vita's Sumioni yesterday. Famitsu.com attended the event and reported back on a few bits of information that producer Junichiro Tamura shared during a Q&A session.
According to Tamura, Acquire will be offering a free update at some point that adds a ranking mode. With this mode, you'll be able to upload your clear time and damage amounts (the damage ranking is based of how little damage you do).
There could be more substantial content on the way outside of this update. Tamura said that the team is looking into adding extra stages via download content. The development team will continue to work after the game's release, he said, so we can probably expect additional developments.
Sumioni sees release on February 9.