Ghostland

From BoardGameGeek:

Jurassic Park meets Ghosts in this Co-operative boardgame about a theme park gone mad! It's opening day at Ghostland, a theme park that contains actual ghosts! However, havok has immediately broken loose, and the ghosts are attacking guests left and right. It's up to you and your friends to stop the ghosts, build Field Generators to contain them, and finally face off against the most sinister ghost in the park, the infamous Rex Garrote! Each players picks a character that is unique and contains their own stats and abilities to help you not only survive the theme park, but hopefully save the day as well! The game is played in rounds where players move arounds the park, fight ghosts, buy items, or try to build a Recurrence Field Generator. Once players have successfully built three Recurrence Field Generators they will summon the big bad himself, Rex Garrote, for them to defeat! But if the park's human population reaches zero, it's Game Over! -description from the designer