Clean Asia is an abstract boss fighting shooter that may take some time to get used to it.
The game offers two different ships to choose from: The “Dash/Attract/Collect Boss’ Weapon” and and the “Shoot/Shield/Charge” ship.
The former is more difficult to handle but also more fun to play.
In order to destroy the boss you have to dash powerfully through the boss to cut off some pieces from him. Then attract those pieces in a magnetic fashion and throw them back to him. If the boss drops a weapon you can simply collect and use it to your advantage by touching it.
The other ship allows you to shoot right from the start. However you are also equipped with a shield that makes you invulnerable. Moreover you can also perform a powerful charge shot.