Vampire Survivors is a frenetic arcade game available on Apple Arcade (or as a free to play with in-apps) and I think the game is vaguely reminiscent of Robotron: 2084. You play a guy on a big flat map with monsters slowly coming at you on all sides. You have one control which is moving around and you attack automatically (the beginning character has a whip and attacks left or right depending on facing but he also adds other weapons that auto aim or whirl around him).

Monsters drop coins. Special bats drop chests with very needed loot and upgrades. There is a bit of a Fortnite storm effect where these man-eating plants form a big circle around you and start closing in and you have to beat a boss to make the plants also go away. As you survive longer monsters get tougher and more numerous but you've also been upgrading your character to maybe keep pace.

There are four characters and several different though other than the initial character and map the others unlock later. Similarly upgrades unlock as you accomplish various things like survive along time or upgrade something a lot. The graphics are kind of 8-bit retro and the background music is unremarkable enough I don't remember it.

The iPad version feels like a direct port adding touch movement. Put your finger down on the screen and move it to go in that direction. On my iPad the game takes 3/4th of the screen and is on the upper right which means sometimes my finger goes tracks off the game and my character stops moving. And in general this game is not that easy to play with touch. A controller would be better.

This is a good action arcade shooting game but it's not a great adaptation to iPad or I suspect other touch-based devices.

Edit: I did get it to go full screen (do an expand touch gesture) but it's still a hard game to control with touch.