I would design a slot, perhaps with cyberpunk theme (I like the neon colors, judge me), but it would incorporate a skill-based bonus round.
When the bonus is triggered, instead of a simple pick-a-prize or free-spins feature, the player enters a brief mini-game (maybe 30 seconds to 1 minute? I don't know). The amount of the bonus prize (multiplier on the bet) would be proportional to the performance in the mini-game.
I think it would inject an element of skill and action into an otherwise luck-only-based game, trying to target those who don't like pure luck games.