Arcademic is a site with lots of games for American primary and secondary students.
Most of these games dealt with calculations and maths, but there is also a section for language games, where we can find six games which focus on vocabulary and sentence structure.
The games are good fun for language learners of all levels, because they test our mental reflexes and wits in a competitive atmosphere. From a linguistic point of view, however, lower level students (Básico 1 and Básico 2) will find them more challenging, as they have to revise (or learn!) basic vocabulary and sentence structures.
I hope you enjoy them.