The tutorial starts by showing you the various power ups. I exited that stage with a very high score and it was soon clear it could only be beaten with more power ups. However, unless you intend to dump cash in, that doesnt seem to be the primary way to play the game. Depressing being unable to match your score from the tutorial.
Also, scoring is totally non-sensical: the reward for speed is so great that putting together big words feels punishing more often than not. Quickly putting in the most basic words you can is much more efficient than actually challenging yourself to do some word science, not so fun.
BruxB about Word Science