Introduction - If you have any usage issues, please Google them yourself
1. Write a simple puzzle game simple mobile puzzle game. After running the initial screen shown in Figure 2-1. Figure 2-1 When you press one of the number keys 1,2,3,4 representatives select the appropriate blue box, blue box is selected then turns red, the other three boxes remain blue. Select the box, press ↑, ↓, ←, → four arrow keys to move the selected box when four boxes have been moved to the middle of the red squares, the game ends. After the game' s interface is shown in Figure 2-2. Figure 2-2 Note: 4 boxes during the move should not overlap the program only to prepare and submit a source code file Game.java, in which you can write multiple classes, do not write multiple source files