The target of 90 Seconds is to guess as many words from the topic as possible... but there is a catch: the words must start with a specific letter.
The more words you type, the more points you earn: if your word is valid, you will earn 1-3 points (depending on how common it is). But be careful: if you skip a word, or leave it empty, the you will lose 1 point!
Note that this game was not designed to be easy, and some of the categories are meant to be difficult. It would be rare if you score 100% in every single category (you'd be THE perfect EspaƱol).