For me the timer makes the game. Most popular word games have no timer stress so it makes it unique, versus just "Boggle but one word at a time".

I would like the option to continue when you miss a word, but I also like the "miss a word and it's over" nature for the actual daily game.

You're not going to please everyone here. You might simply need to let the player pick a difficulty level, for example:

- Relaxed - No timer, keep going when you miss / Hurried - Timer, keep going when you miss / Rush - Timer, stops when you miss (default daily)

I think you really have something here! I love word games, and a new one that I would play daily doesn't come along often. Nice job!