Saga of Craigen: Stones of Thum

Game description:

Turn into a real Viking in this game and play inside a magic cave. Here, a lot of treasures are hidden and you need to find them. You will control a large slingshot that shoots with balls. And the task is to destroy a string of spherical colored crystals that appear on the screen. Once you are shooting the target, you need to collect three or more balls of the same color. Then they will disappear and will not reach the magic portal at the end of the path. Be smart to get the highest score.