WASD to move. Survive the black cat. He will chase you around. Getting hit by the black cat makes you take damage. Patch up your wounds with medkits that spawn around. Press H to use a Medkit. You get downed at 0 health. You won't be able to move. Use a medkit to get up, if you don't have a medkit, spam the space bar to fill your life bar to get up without a medkit. The black cat will search for you once you're down. Get up before he finds and attacks you. Once he attacks you while you are down and your health goes negative, it's Game Over.
Press Q to hide UI. There could be medkits behind it. this is so bad lol