From the announcement:
Castell is the vibrant Catalonian tradition of building human towers. Huge teams of people from all over Catalonia gather at festivals to celebrate Catalonian culture and compete to build the highest and most difficult human towers.
Castell is a strategy game where players guide Castell teams through a year of festivals. Visit Catalonian cities, expand your team of Castellers, learn tower-building skills, and show off your tower-building prowess at local performances and festival competitions.
Harness your strength, balance, courage, and common sense to take your team to victory!