I'm not used to work games being frenetic and punishing. Surprisingly, it's a nice change of pace. The longer your words are, the higher your score will be, yes, but that's a secondary skill. First you need to learn to think quickly, on your toes, and deal with whatever letters come your way. A run without consonants or without vowels can be hard to overcome, though with careful planning you stand a chance.
Ultimately, like Tetris you will lose at Lumicon. It's just a question of how long you can hold on.
Lumicon [$1.99, iTunes]