The game is just great! It keeps my mind boiling every single time!

extreme lack of variety in playthroughs. It starts off seeming as if it will be a game that opens up, but there are no real challenges to strive for other than just max a high score as unlocks and other variations of how a game plays out is non existent. I would just play boggle since it is at least more challenging

As a roguelike fan, this is not a recommend, - the modifier variety and influence on your gameplay is pretty insignificant but for a few (also the legendary modifiers at times are straight up more useless than the common ones).
As a challenge to test your English vocabulary by patiently brainstorming all the possible word formations from the given letters - it's fun, as you can see I have plenty of play time.
Unfortunately, completing the last difficulty seems nigh impossible and it just isn't very fun to keep trying, - the point requirement scaling is high, even if you find a word so crazy you pat yourself on the back and celebrate - it's sometimes completely useless in the long run, and one minute later - you're hanging by a thread again, scrambling for points to win a round. Had a couple of runs where the setup felt close to being broken I guess, but that never took me further than completing Legendary and Marathon modes.