Thank you! I dont understand the last part of your comment. When you run out of fuel, it should appear a game over screen and let you restart the game. Does it not work like that for you? I got a person that sometimes gets a black screen if they loose because the alien starves and they cant continue if they do not restart the website, but if that happens to you in the run out of batteries game over, thats a bug I still didnt know about until now!
EDIT: Ok we are testing it now and the black screen appears everytime the slug starves, maybe thats what happen to you? It is weird because it was working fine in almost every computer I tested it except from one, and I didnt update teh files since then
EDIT2: Ok I think the problem is that the starving game over doesnt work fine if you skip the tutorial, it works fine if you play the tutorial. May that be your issue? I'll update it fixed once the jam finish, thank so much for let me know!