I am still using the arrow keys, I must be an idiot , too. If this script helps you with the vim movements, you can check out for the same reason two or three scripts of mine, in the same repo: tui-mines, mneme,tui-sudoku.
About .local/bin/ not existing, or not being in the $PATH, that is why I also propose running the script locally, from the same directory with ./mneme.sh
IMPORTANT UPDATE: Since many youngsters who unlike me, a senior citizen, live on the edge and hate vim keys or arrow keys, have requested an alternative navigation keys set up, I have just implemented a configuration option that satisfies just that.
By editing the config file (either within the application or just editing ~/.config/tui-mines/tui-mines.config, and changing the NAVIGATION_KEYS value from vim+arrows (default) to aswd+arrows, the user can use the aswd keys to navigate in the game grid, just as requested.
No other commands or hacks are needed.
Arrow keys remain hardcoded, because they remind me of my youth, as an archer, during the Peloponnesian War