One of the most powerful features from Jwno's key binding system is that, you can specify multiple key combos in a sequence, and it will automatically define multi-level keymaps for you (akin to Emacs key bindings):

"Win + Enter  Ctrl + A  B"

This means press and release Win + Enter first, then press and release Ctrl + A, and finally just tap the B key. You can use any keys recognizable by Jwno in any level of the keymaps, including all the modifiers.

A typical use case for multi-level keymaps is to group similar commands together, and give them the same "prefix". For example, in the example config, all the infrequently used window commands begin with Win + W.