Ben 10 Demon Hunter

You control Ben with the arrow keys for movement, aiming and shooting with your mouse at the monsters that approach from all sides. The main goal is to survive each wave, clearing the area of enemies to progress. You have to constantly strafe and backpedal to avoid attacks while landing your own shots. The pacing is insistent, with enemies spawning frequently enough that you rarely get a moment to pause. It feels like a tense, continuous scramble to stay alive.