Touch green to collect health. Move your mouse to control the red mouse/heart. Click on Undyne to lower her health. Avoid all projectiles, except green projectiles. Red Xs lower a lot of health, very fast. DO NOT stand still for the blue spears. ATK is randomized. DEF is 0. Good Luck! (It's pretty easy.)
Based on Clickertale! If you remix, please change something and don't use the name "Clickfight."