Design
The game is designed as a classical vertical scrolling shooter, it lets you control the Fatcat and the Owl facing hordes of alien enemies.
The main menu provides a short help, credits and score boards. Levels can be accessed through a level selection screen. There is not much to say about the design except that levels are well crafted, with nice puzzle like challenges to solve, and it becomes very challenging with later levels.
Gameplay
Fatcat let you control two characters a the same time to create an unique gameplay style. The owl shoots and blocks bullets, being immune to all damage. It is controlled with the mouse pointer and left button. The Fatcat is controlled with the keyboard, and is quite passive but must be protected as it can only receive three hits before dying and it must navigate through the levels.
The cat can collect cookies to fill up his special attack gauge. The cat attack is pretty powerful and is also able to destroy special rocks blocking the way in some levels. The owl is also able to fetch food for Fatcat as it moves much faster.
This mechanism alone would make the game original but the owl can additionally move blocks to clear a path, push buttons to activate special powers, and must be synchronized with the cat to provide a mobile shield.
Each world ends with a classic boss battle using massive attack patterns to test your dodging skills, but with the additional twist that you still need to control the second character to cause damage.
Presentation
Based on great anime style pixel art, the game is using colorful graphics and varied enemy design. The animations and visual effects are also very appealing and graphically consistent.
Background music is well designed using a couple of uplifting electronic loop soundtracks.