Cuphead is bringing all the weird and wacky aspects of 1930's cartoons back to your screen, with a helping of deviously difficult combat. - From USgamer.net
You'll have to complete every boss level in a world in order to advance to the next world, and you can see your progress in every world by going on the List option after pressing Y, and coming to the screen just below: In some cases, beating Run N Gun levels will open up additional parts of the world that were previously inaccessible to you, so if you find yourself unable to reach any more boss battle stages in a world, make sure to go back and beat any additional levels you've missed.
All the gold coins that you earn in each Cuphead level go towards your total coins, which can then all be spent on upgrades and perks within the store run by Pork Rinds, who you can see below.
You can have a maximum of five of these playing cards stored up through inflicting damage, and you can spend a playing card by pressing B to launch a missile.
This is everything we have to impart on Cuphead as of right now, although once we've delved deeper into worlds that are currently beyond our reach, you can be sure we'll update this Cuphead guide with additional tips and tricks to help you beat the Devil.
Here's the definitive list of the very best exotic weapons (including Rat King, Sturm, and Mida Multi-Tool) and exotic armor items you can find in Destiny 2.