Mr Bullet - Ninja Killer is a thrilling puzzle game that is now available for Android users. In this game, you play as a spy who must use your gun to take down ninja enemies. The game is easy to play and offers new levels every week. Best of all, it's completely free to download and play.

The main objective of the game is to eliminate all ninja enemies using your gun. As you progress through the game, the levels become increasingly challenging and you must use your strategic skills to defeat the enemies. With each level, you can increase your levels and become a more skilled spy.

One of the best things about Mr Bullet - Ninja Killer is that it's completely free. You can download the game and start playing right away without having to pay anything. Additionally, the game offers new levels every week, so you'll never run out of challenges to conquer.

Overall, Mr Bullet - Ninja Killer is a fun and addictive game that is perfect for puzzle game enthusiasts. With its easy-to-play format and regular updates, it's definitely worth a try.