Haha, this is hard to play with cVim bindings on Chrome.
An insert mode inside an insert mode.
Editing text with Vim is already pretty game-like. Some of my favorite combos are gg=G and yyPVr*. But of course I prefer to play with mods (surround.vim etc.) and texture packs (colorschemes).
All configuration is done in JavaScript rather than cVim's weird viml clone language. SK is way more flexible in my opinion.