Ragdoll Human Workshop 2D is a physics simulation sandbox. There are no predefined goals or objectives. Simply throw objects into the world and interact with them in various ways. You've found something that doesn't look like other things you've used in the past. You can try to make a very funny machine, you need to pick many types of weapons just like balloons, syringes, hammers swords, and many different fun things that you can use. then just aim and hit the enemy and have fun killing them.