Touchscreen controls are basic but acceptable.
Gamepad works fine, the default button mapping is nonsensical but you can reconfigure it.
Do not expect shiny graphics with shaders, it’s on the level of PS2 but with better screen resolution and textures.
Levels are big and easy to get lost. If there’s a map function somewhere I did not find it.
There’s an online multiplayer available. Since the game is based on ioquake3 engine, it can download some wacky mods and maps from the server, and force 1st person camera, so it takes time to understand how to play.