Whiteout

How to play

1. Swipe (or use the arrow keys) to slide every tile.
2. Same colors pour together and get brighter, up to full brightness (3 dots). If there's too much, the extra stays behind.
3. Two full-bright colors mix like light: += += +=
4. Add the missing color to make white, which vanishes for 100 points. The ring on a tile shows what it needs. += += +=
5. Two mixed colors head toward black, and there's no going back. Add the third to make black. ++=
6. Black dims every red, green or blue tile touching it, once per move. If it dims one all the way out, the tile is erased and the black fades away too.
7. Shortcut: three full colors in a row (R, G, B or C, M, Y, any order) collapse in one swipe.
8. The game ends when nothing can move. Go for a high score!