Plinko
Drop the ball through the pegs and land on a multiplier. Low / Medium / High risk.
How to play
Drop the ball from the top of the board and it bounces off the pegs through 14 rows, landing in one of the 15 slots at the bottom. Each slot carries a fixed multiplier.
Choose the risk level before dropping. Low risk clusters the multipliers near 1x with small wins and losses; high risk pushes the payouts to the edges. The chance of landing in each slot is the binomial distribution of 14 left/right bounces, so the middle slots are the most likely.