Angry Birds maker Rovio launches new Amazing Alex franchise.
Rovio - the creator of the hit Angry Birds video games - is releasing its first new franchise since 2009.
Amazing Alex's performance will be closely watched after the firm's earlier series racked up more than one billion downloads.
Players must arrange objects on screen to create a chain reaction in which each piece of the puzzle has an effect on another until the goal is achieved.
One analyst said the firm might find it hard to repeat its previous success.
Unlike Rovio's other games, Amazing Alex began its life outside the Finnish firm.
Amazing Alex's performance will be closely watched after the firm's earlier series racked up more than one billion downloads.
Players must arrange objects on screen to create a chain reaction in which each piece of the puzzle has an effect on another until the goal is achieved.
One analyst said the firm might find it hard to repeat its previous success.
Unlike Rovio's other games, Amazing Alex began its life outside the Finnish firm.
