In order to help college students who have difficulties in passing CET-4 and CET-6, our group uses teaching and fun to get rid of boring memorizing word books and using mobile phone app to achieve the purpose of increasing English vocabulary and memorizing words unconsciously through games to improve English proficiency.

The game belongs to the virtual reality shooting defense warfare type, there are three main scene modes, namely, air combat, land combat and naval combat. The player acts as a guard's combat weapon, protecting the rear from enemy destruction. After the game starts, both the player and the enemy will have a prompt box in the corresponding position. The player's prompt box is written in Chinese, while the enemy's is translated into English. Only one of Rudo's enemy forces is the correct English translation of Chinese. Players choose the enemy, if the choice is correct, the rear is protected successfully, a moment later other enemy appears, the game continues; if the choice is wrong, the enemy advances until the player chooses the right or hits the rear. The rear health is zero and the game is over.

In addition, the game has a wrong word system, which is the same as the wrong word system in the common word memorizing app on the market. When the rear is hit once or reaches a certain condition, the corresponding word is loaded into the wrong word book. Players can view unfamiliar words through the wrong word book.