These are Chinese characters of different colors and one word below each word - these are "wealth", "lucky" and "good luck". There are red envelopes and koi in the pond. If you play the classic or luxury version, the main rewards of the game are very similar, although the luxury version is more comprehensive. You will trigger this by hitting 3 gold coins on the reel.
Your first choice is to have 25 free games, each of which will see any victory using the Koi wild symbol multiplied by 2x, 3x or 5x. The other four options show that the number of free spins available is reduced, although the multiplier is increased. The minimum available number of rotations is 10, and the multipliers are 10x, 15x and 30x.