One of the earliest chapters I've ever uploaded was on one of my favorite mobile game series, Bloons Tower Defense (BTD). Recently they've released a new game, BTD Battles 2. This game uses prior existing elements of their BTD 6 game with only a focus on 1 v 1 pvp (player vs player).
[Their games are also all available on PC]
Just as a heads up, the game is not really beginner friendly due to it being real time. Thus without basic game knowledge, you will most likely be heavily punished. If you want a great experience, I'd heavily recommend BTD 6.
I've been occasionally playing BTDB 2 the past few days and I'm currently on 26 wins with 30 games played. BTDB 2 has been a great experience so far. My only real "bad" experience was losing my 12 win streak and my 100% win rate due to a connection loss of ~1 second...
It even gave me the option to retry my connection only to instantly open a defeated screen.
BTDB 2 is basically a real time tower defense game where you need to defend and attack at the same time whilst also managing your money income. It's also free which is an added bonus.