Feature request: Hardcore mode

[puyoau]

Hi, requesting an independently toggle-able mode (available for all normal, hard and ultra) which treats rule violation guesses ruthlessly:

In "normal" mode this would only trigger on guesses which aren't valid words In "hard" and "ultra" modes, this would also trigger on guesses which violate green/yellow placement rules

On rule violations, the guess is not rejected as usual, but appears in red with no grey/green/yellow feedback, and uses up the guess.

[lynn]

That sounds kind of fun in an evil way!