looking over the circle list for November's Digigame Expo rn and I see that DSM's making another appearance—this is a WIP doujin STG by an anonymous dev with no online presence that just kinda shows up at offline events once or twice a year, and the above clip is virtually the only glimpse anyone's deigned to share online (in accordance with the dev's request that they keep the demo to themselves; that footage is 4+yrs old and the current build's allegedly much more advanced). I can certainly respect it, but cmon dude, put up a landing page or something...
(btw, the STG devs have their own block at Digige, and Nicolai from Endless Shirafu is organising a multi-dev caravan event)