As the titular Gravity Duck you must control and flip gravity to reach the end goal of the yellow egg. You can invert gravity to shift your duck from the floor to the ceiling but the game adds a level of complexity by introducing portals that also rotate you 90 degrees.
As the levels become harder you must use precise twitch controls to navigate all the obstacles/monsters and figure out the puzzle of each level both up and down, and left to right. With 140 levels in 4 different environments, Gravity Duck has enough gravity flipping fun to have you seeing things upside down.
Devious Dungeon is a medieval action platformer with randomized dungeons and tons of enemies to battle on each floor. Fight your way through each level locating the key to open the portal until you reach the boss associated with each zone. Once you kill that boss, you can start your next play through a little deeper into the dungeon. Ravenous really hit a great balance with DD where each run allows you to level up your stats and gear and get a little further each time. The proverbial carrot on a stick effect.
Basically you slay enemies, earn experience, level up, collect loot and do it all over again. Devious Dungeons has the tight platforming controls you would come to expect from the League of Evil creators and will be priced at $1.99.