How to play: click on the 3 objects at the right top of your screen and drag them to make a base. The goblin/enemy is the one you'd have to kill. The trajectory button is to show trajectory in small white dots and the play button is to start. Once you've made your level press on play and enjoy your game. The Boulder is a slingshot and you have to hit the goblins with it. 1 try, to make it not that hard I made it so if the goblins fall they die on spikes.