Random details you like

Specific or obscure things in Cave Story that you like or that make an impression on you.

For me, the tiny cutscene of the fire in Chako's house reigniting when you go outside. Something about the Bushlands music, scenery, the imagery of the fire coming on and the brief half-second freeze in gameplay has this really special feeling to it.

 

The credits mentioning that there's only one chinfish. That's pretty funny.

 

i like the mechanic of reading the books in the bookshelf to save curly in waterway, i didnt expect something like that to appear in the game

 

How about discovering you can stand in Ballos' eyes, or stand on Balrog's head, ride critters
Or that one red line that denotes where to jump from... Lots of hidden details to discover.

Hmm, but something that made an impression? I'd say all the extra details that tease at the events prior to Cave Story. Hearing about Arthur's battle; about the previous demon crown bearer; the room of statues; etc... Those kinds of mostly unnecessary details led to a lot of imagining, had a lot of impact.