Collect all of the colours of the rainbow, by making 3-in-a-row of the colour. Do that by sliding one of the tiles to make 3. Each level requires more colours to be taken, so you need to be fast. The full version gives you 3 bonus games (just click on the letters of RAINBOW on the title screen 4 times). The bonus games gives you "scroll" (remove all tiles as the screen scrolls up), jewels, and "blocks" (remove blocks of the same colour).
