It is said that it is possible to play the game on the phone, how to do that? Are there any possibilities of this game going to play store?
There is a mobile version actually, but it has been abandoned. While they don't fix the mobile version, you can play Magic Survival for Android instead, which was the inspiration for Vampire Survivors (the VS devs even say so in one of their update posts on Steam). It is a wonderful game as well. It will be also be ported to iOS soon.