Cry for help in looking for a movie/show

This isn't some setup for an ARG or whatever btw

I've been looking for this kids horror movie/show. I vaguely remember renting it from one of those RedBox machines and watching it when I was younger and it freaked me the fuck out. It's about these two kids getting lost in this old west town and everything looks normal but it turns out that all the people and things in it are made of slime, very freaky to young me.

Please do let me know if any of you have ever seen or heard of this or just feed into my delusions and mess with me on this.