According to the site, DragonSlayer is a dungeon crawl RPG where you use your party to destroy monsters, recover treasure, and return it to the village. As a result, it contains light gaming that can be played in short breaks during a hectic workday. As you find crowns in dungeons, you can use them to summon boss monsters to fight.
If you get in on the twitter campaign, it’s possible to get rare items. Also according to the video as below, Adol, Carna, and potentially others will be available in the game through Bandai’s collaboration with Falcom.