Please note the clip of the game I'm talking about is in timestamp 0:16. The game which I want to identify is not Yandere Simulator.
This game? It’s pixelated, and looks like a roguelike
game-identification
Related Solutions
The game is Halo: Spartan Assault (or maybe Halo: Spartan Strike).
The size of that picture is too low to find a definite answer but it is from either one of those. Both games looks like this: The map is green-er on Spartan Strike, so that screenshot is from Halo: Spartan Assault. Here is a screenshot from the PC version of the game (mobile and Xbox versions have some UI differences):
Appears to be a game called Legacy of Discord: Furious wings. You can see some of the gameplay in this video at around the 1:38 mark (as well as what may be your screen shot around the 2:02 mark). Oddly, the video itself has it labeled as "Legacy of Discod: Furies Wings" but when typing in "Legacy of Discod" Google was suggesting the other title.
As suggested, it is available for iOS (and also android).
Best Answer
The game is Nuclear Throne, and it is indeed a top-down roguelite shooter.