To start, press the green flag icon. There is also a fullscreen button to the left of the instructions section. I finished it! Credits to Tanzeela, my partner for this project (she doesn't have an account)
Sorry if the sprites/backgrounds seem a little all over the place, I mostly focused on the info to save time. Music credits: https://www.youtube.com/watch?v=3LGdFKIXr9I (song that plays when you encounter a caterpillar by solaris)