While it's not a true gameplay trailer, some elements of gameplay can be seen. It appears that killing Titans may require some quick time events, which is somewhat dubious in theory, and would certainly be overshadowed by the gameplay offered by Feng Lee's fan game.
However, before I managed to dismiss the game as some shovelware, I realised that it's being made by Churnsoft, the developer responsible for 999 on DS, Zero Escape on 3DS and Danganronpa games on PSP/Vita. As such, the game perhaps has some solid chances of turning out great.
ADD: Old Trailer








