Looking at your comments, a lot of my thoughts have already been said. I like the idea of snake, but everyone you're trying to save is panicking, but everything moves slightly too fast, and when they follow you, they tend to cut corners and die. It's also not very clear what is background, and what is considered a hazard that can kill you. I'd suggest trying to add a border around the sprites of things you can collide with, and keeping the background without borders around the sprites to see if it helps with that. The good news here is that most of these are a few small tweaks, and you've got a pretty fun game!