If you've played PM256 before, then you know what to expect here. You're a mama duck trying to rescue your ducklings. Explore the maze, collect coins, find ducklings, and fight bosses. Between runs, you can spend coins on upgrades, or check out the library to view bestiary entries you've unlocked.
It's a solid game, from what I've seen so far, and the price is reasonable.
Also, there's a cat.
Need I say more?