There are buttons in the bottom-left. Select them and place them on or around the island. Then click "start"!
those controls are visible only for a short time - they scroll away upwards - after 3 seconds there is nothing left i could click on. sorry, but i can’t play/test this
Once you press "start", the simulation starts and you arent supposed to do anything. Place objects BEFORE you press start. use right-click to place.
