What games for 10-15mins?

Like most of us that have grownup with N64 very rarely do it get a good 3-4 hours to sit down and play a Zelda or SM64. However, I do get lots of opportunities to play for about 10-15mins, so recently I picked up a summer cart and now with a full game library wondering what to play when I’ve only got a short time? Favourite atm is killer instinct gold.