VETRIS [Download] SIMPLE AND CLEAR: Based on four colors and only one simple rule: do not touch the same color squares. ENTERTAINING: Have a great fun and entertainment for many years: play a couple of minutes or as long as you wish, fulfill your leisure time or compete for the Top Ten scores. RELAXING: Relief of everyday stress and anxiety: it works like a brain aerobics, improving memory, providing clear and rational thinking and increased mental agility. UNIVERSAL: Suitable for all ages  from preschool children to adults: everybody can play, with or without any experience, it's simply irresistible.