Smilers shouldn't be able to go through walls and doors. Or there should be a command which allows the player to control this.

For example: In the backrooms map (Recommended map) the smiler can attack you "outside" the actual backrooms, because it can go through the facility door if it's closed. That means there are no safe places on the map. It's a really cool addon and I would really like this feature.

Could be done. It's a sort of a "unstuck" mechanic but I could make it go back to the spawn position instead. Kind of a escape mechanic.

A couple of ideas I got for Smiler is adding some things the info says about him and also some things I'd say are cool:

For example, "Smilers are attracted to light, and will chase after anything remotely bright." I think this would be a cool feature to add (if you can) since if you turn on your flashlight and point it directly at it then it will go after you.

Also being passive creatures but they will be hostile when you start to make noises or start running / moving.

You should also probably make Smiler a bit more interesting, when I say this I mean like adding the ability for him to teleport to dark spots on the map (if there is any).

The first 2 are a thing already tbh.

Read the description please.

If multiple are placed, perhaps in random fashion some may decide to group together and roam as a pack. Could be pretty frigthening.

put a health level of the clasic 560

Idea: The smiler will always try to stay in a dark area unless the player does something it hates very much like attacking it. And try making it attack zetas

make peaking and waiting

Slow him down, at his current state this guy is so fast you can't escape him. He doesn't even pretend to be slow.