A standard US nickel, yes.

I prefer better odds than that…

Thick Nickels

The old UK £1 was similar in size but twice as thick. It's now 12-sided but not sure how that impacts the odds.

Well, but it also has to stay on its edge, and that's a lot less likely...

Not if it's a thnickel.

It should come with some bizarre consequence, too. If it were the Oregon Trail game, there should be a tiny chance that the player finds an ancient artifact that glows and hums when touched. An alien ship swoops in and abducts the party, forcing them to join the crew. From there on, it's a space pirate game with zero explanation why and no references in the product literature. Also, customer service pretends not to know about it, if contacted.

Rare coin flip: Success for every roll over the next hour of gameplay.

https://youtu.be/vAA-A9t7TD0

I brought this up in maths class once. The teacher agreed that the edge was a possibility and since he was involved in football, they used to flip the coin and let it land on the ground. More than once it stuck in the mud in the edge.

Then told us to ignore that possibility.

Even not considering that, they still aren't 50-50 odds. The stamped printing on both sides throws off the balance just enough to bias one side over the other.

dice are just flattened spheres. they only have one weirdly shaped side

Make sure to wear long gloves and short sleeves. The dye in that water is strong. I was purple for days after cracking an 8ball and people kept asking how I got hurt.

Oh, I still bought the full set, but I tried to get isohedral dice whenever possible.

There are 4 stable orientations and 2 unstable equilibria