This is a great game so far. Would love it it ended up being released on phones as well. I can totally see this doing well on mobile platforms.
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.