Unable to answer "What are the opening hours here?" for node/1245000021 via StreetComplete 55.0:

I can't find blue cloud gift store

study halls should not be tagged as library per the osm library tag wiki... suggest retagging this... not sure if there is a good tag in use for things like this though, any thoughts?

There are a number of study halls tagged as libraries on BU campus here that should all be addressed including:
node/1979412543, node/1978952664, node/1978505195 and node/1976086727 there may be more...

Drinking water fountain and splash pad are located here

"https://eurekapuzzles.com/ states they are not here, but at the next block."
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2023-07-10T17:38:00Z
POI name: Eureka!
POI types: shop-variety_store
#organicmaps

Riverway should be made a relation as multipolygon to remove all the individual polygons for it along its boundary

There’s no way for pedestrians to get here, is there? This seems to be on Boston Sand & Gravel property (that or railroad property), and the main access point by Bunker Hill Community College has a prominent NO TRESPASSING sign. I don’t think they want random people walking, biking, etc around back here, as it’s right next to active train tracks, there’s often heavy construction vehicles moving around on these service roads, etc.