In Slendrina Must Die: The Asylum, your main goal is to explore The Asylum, where you'll find an angry Slenderina. You have to make sure you don't die at her hands.
To get out of the asylum, you need to find 8 medical books and stay away from Selena and her mother. Once you get out, you have to find 8 corpse hooks in the backyard.
To move around, press the WASD keys. Press and hold CTRL to crawl, and press and hold Left Shift to run. When you press Space, the character will jump. Move your mouse to look around, click RMB to aim, and LMB to fire. Press C to see what's around the next corner. Use the Scroll Wheel to choose weapons, and press R to reload.
Have fun and good luck!