Here is the link to my prototype, everything should be working nicely.

Tip!! Make sure to click the snake in the first 2 time it goes past your screen. I've only animated it for the snakes to come twice on the screen. I tried my best to get the snakes to animate, but found it difficult to make a working prototype

Catchthesnake_Shan

I've updated all the changes from the feedback I have received from you two and from the eye tracking.