it's really neat opening level files for old games in hex editors
a lot of the time, they are just 2d arrays just dumped right into a file, so you can see the shapes of the levels if you adjust the width of the wrapping!
like, here's the first level of duke nukum 1 in HxD next to what it looks like in-game!
with something like imhex, you can even visualize it to see the details a little more clearly with its data processor!
so! i ended up writing a super-simple pattern to let me see what's in the maps more specifically~
each different color is a row in the map layout, and if i mouse over any bit, it will tell me what kind of sprite it is on the map there! (it will also tell me the coordinate i'm looking at)
huh, short game