qmv -f do ${dir}
... for quickly moving and renaming files. The default 'qmv' opens up your preferred text editor with a list of the source and destination name of the directory of files you want to move/rename. The '-f do' tells the command we only want to see/edit the [d]estination [o]nly. If you need to rename/move a bunch of files, it's much quicker to do it in vim (at least for me).
Hollow Knight is just amazing. Reinvigorated my love of Metroidvania-style games. The atmosphere, the environments, the movement, the controls, the music, it all works so well together. Just amazing.
Which leads me on to the second recommendation. Steamworld Dig and its sequel are pretty unique in the genre. They're Metroidvania games, but you're creating most of the tunnels and platforms as you go. Great character designs, and smooth progression all the way to the end.