It's great you can create style rules in Bloom which changes what nodes look like.
But... you can't seem to change the name from "Rule Style N" to something more meaningful. Also clicking on the x to delete the Rule Style doesn't have a confirmation that you really want to do that... Maybe the icon should be a garbage can because you're deleting something.
[added] I filled this as an issue here: WANT Bloom: edit "Rule Style" names · Issue #24 · neo4j-devtools/neo4j-bloom · GitHub