Now, I'm not a game programmer and I know that making games in 1985 was a lot harder, but I feels like if you're making a vertically-based platformer where most of the gameplay is jumping, you're going to really want to nail the feel of the jump mechanic. Never have I played a game where the controls are so terrible that they effectively take a crowbar to the game's kneecaps the way that Ice Climber's terrible jump mechanic ruins an otherwise solid game premise.

A lot more playable on the Nintendo Switch Online service where you can easily rewind the game so that you can keep trying to make certain jumps, but don't bother playing it on the original hardware. I own a physical cartridge of this game. Don't suffer from my mistake.

If this game was made like two years later it would have been much better.

A good idea with weak execution, mostly in part due to the poor physics. Jumping is almost fun but it just doesn't get along with the game. Collisions can also be wonky.

The biggest sin is multiplayer is worthless since you'll just be unintentionally working against each other despite it being co-op, which (while not this game's fault) goes against everything Nana and Popo are known for these days.

Also visual level variety would have been great.