Three kinds of mode, test your reflexes.
1.Free Mode
Click the UFO to shot down.
A total of 20 rounds, each round at least shot down 1 UFO.
The faster you are, uh, the higher your score is.
2.Challenge Mode
Click the UFO to shot down.
Must kill all the UFO.
The faster you are, uh, the higher your score is.
3.Speed Mode
When a UFO flying, click on the corresponding color piece.
The closer distance, the higher the score.
But encounter color piece is failure.