"amenity=school" doesn't seem right for something that isn't actually an educational institution. "landuse=governmental", perhaps?

Is there a reason why you changed I-90 Business from a route to an administrative boundary?

Welcome to OSM!

The common practice when mapping schools is to put the name only on the school grounds, and leave the school building unnamed unless it has a name distinct from that of the school as a whole.

Did you intend to turn a couple stretches of George Washington Way into barriers?

"Living street" is pretty much a purely European concept. If you find something elsewhere that looks like a living street, it's probably a driveway or an ordinary residential road.

Is this really a worthwhile thing to do? Sure, it's typographically better, but nobody's got an en-dash on their keyboard. Someone searching for "Croton-Harmon", for example, had better hope that the search engine understands that all short horizontal lines are equivalent.

Is this really a stretch of one-way service road? It doesn't look like it in aerial imagery.

Wouldn't that be a not-a-building?

Whose park is that? It's not one of the ones on the city's list.

The "pedestrian access" question is about whether it's *legal* for pedestrians to use the road, not if it's safe. If there isn't a "no pedestrians" sign, pedestrian access is legal.

I'd go with a "lifecycle prefix" of "construction:". I'm not aware of any maps that will draw it, but QA tools should flag it for updating after a while. osm.wiki/Lifecycle_prefix

I'm not seeing anything in the area that I'd call "scree", even away from the fields.

Looks pretty good.

I see one mistake: your crosswalks are all free-floating, not connected to the rest of the road network. This means that drivers won't get alerted to the crosswalks.

This is easy to fix in iD (the in-browser editor that you're using). Simply click on one of the crosswalks you created, open the "Issues" section on the left if it's not already open, and click "Connect the features". Repeat for the rest of the crosswalks.

For mapping large objects like the forest you're working on, I recommend using the JOSM editor (https://josm.openstreetmap.de/).

It looks like you removed the "highway" tagging from a section of MT-287 in this edit. Is there a reason for that?

If you're not going to use changeset comments, could you at least be a little more verbose about not using them? A single dot is rather hard to click on in the list of changes.

Whatever you're doing that's resurrecting long-deleted nodes, stop it.

Are you sure you put Ron's Food Mart in the correct place? In the aerial imagery, the building you mapped looks like a gas station, with the convenience store being in the next building to the west.

Is the Kenworthy Theatre a cinema? It was already added earlier this year as a theater.

Is there a reason why you deleted an elevator in Seattle?