Memopolis: Saving Friends

Your friends, Tralalelo and Tung-Sahura, have been kidnapped by a villain and locked in a cage. To save them, you need to collect five meme artifacts.
Complete tasks for the residents of Memopolis. The more artifacts you collect, the closer you will be to salvation!
But time is short - if you don't make it, your friends will remain captive to the villain forever. Forward to victory!