Cuphead on Xbox One (X1)

Skipping Cogney Carnation

While battling Cogney Carnation, the flower in Inkwell Isle 1, you can basically skip her. When she closes her hands to send pellets at you, you need to be on the right flying platform. When she opens her hands, you need to dash through them. You will take damage, but she will be stuck on the pellet animation for the rest of the battle.

Iron giant

When fighting in the junkyard you will notice the robots design is that of the Iron Giant.

Secret path in world 1

In world one complete, head to the first level. To the upper right corner is a trail that follows alongside of a river. Follow it to get to the other side of the water which skips you a level and gets you an achievement.

Secret path in world 2

When you get into world 2 head north through the red tent, then walk up north again up the staircase (if it isn't there, complete the first level first). I cannot remember if you need to complete the level to get the stairs or if the stairs are already there. Once up the steps you'll see the birdhouse. Walk behind the birdhouse and walk right.

A Free Coin

On the first island you come across a coin avatar who says his money is scattered around... between two trees there is a little yellow mark beside the avatar with the axe for a head. Walk up to it, click the action button (A) and get a free coin