An Uno variant, players try to clear their hand first by playing a sequence of numbered cards. The deck has blue, red and yellow cards. The yellow cards are numbered & have actions (skip a turn, pass a card to the left, take 1 card from 2 others, re-deal the hands). The blue and red are numbered 1 to 20 and have arrows, the blue point up, the red point down.
Players get 7 cards and start playing to a stack, drawing if unable to play. If the top card is blue (UP), you can play a sequence of blue cards going up. If the top card is red, going down. You can play one yellow card of any number, perform the action, but the direction doesn't change. You can only change direction by playing the same number of the other color.
So if the top card is blue 10, you can play any yellow, or a sequence of blue upwards starting with blue 11 or higher, or a sequence of red downwards starting with red 10 only. You can play yellow cards inside the sequence, but a final yellow has the action as well.
When someone clears their hand, they get +5 points and you lose a point for each card you hold.