Bit late, but new PVs came out :
https://www.youtube.com/watch?v=DQy3woCycCsNot only do we get more gameplay in this one, but we also get to confirm that Reimu, Marisa, Yukari, Remilia and Sakuya are confirmed to be playables. So yeah, classic era 2hus as far as cast goes. Vanilla stuff. I'm kinda hoping that there'll be some newhus from more recent era cuz c'mon.
Anyway, piecing what we have with the current PVs at hand, imo part of the gameplay might be like this :
-Powerful spellcards that pretty much flood the entire battlefield with your bullets
-Regular gameplay where you choose shot types (in real time) to send towards the bad guys
-A positional aspect to the game where you move your 2hu around in order to either dodge bullets or to get value from either the regular shots or the spell card bullets (so as to emulate some Touhou-ish feel or need to dodge stuff I assume)
-The possibility for at least 2 2hus to be on the battlefield together
There are also a bunch of stuff that are still unclear such as the colored cases on the battlefield, why the numbers showing the damage dealt by Reimu's attacks are colored in green instead of white like for other characters.
There are also a bunch of unclear things such as whatever Marisa is doing in that stall (shop or upgrades ?), and not sure if the duration of the game or the number of maps are gonna be related to the 30 days period during which the event of this game is gonna last for (going by the interviews) : are we just gonna get 30 maps or something more ?
So yeah, quite a few unclear stuff due to the game seemingly being somewhat unique. Not really sure what game to draw parallels to with this one, but I'm still pretty interested in how this one'll turn out.
https://www.youtube.com/watch?v=aGIL07ey46cThis other video features 5 music arrangements for the 5 characters that are confirmed to be in this game. There seems to be a total of 20 tracks in this game (going by what we see in this video, assuming there's no "next page"). If we assume that some of those question marks could be music for a bunch of miscellaneous stuff (for example title screen, overworld, dialogue and so on), I think a minimum of 15 characters would be a generous assuption as for what to expect from this game.