Zhang-Dexiang Airplane_Invader

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Tasks: 

1. layered background (background /middle ground /foreground)   (Cloud is Foreground and sky is background)  ✔
2. at least one image      ✔
3. a player-controlled sprite    ✔
4. an enemy sprite with automatic movement   ✔
5. the ability for the player to shoot bullets at the enemy   ✔
6. automatic shooting bullets from the enemy to the player   ✔
7. collision detection of bullets, using tags so that a player does not kill himself with his own bullets  ✔
8. sound effect on collisions   (when airplanes get hit by bullets) ✔
9. health score for player and enemy, displayed   ✔
10. animation #1  (player animation) ✔
11. animation #2  (enemy animation) ✔
12. at least three levels in increasing order of difficulty. Document the difficulty of each level in the directions. (Total 4 levels, document can be find in menu slide) ✔
13. scene transitions: Every time that your player destroys the enemy, the game should transition to the next level. Every time your player ship gets destroyed, the current level should be restarted.   ✔
14. directions (include the basics of each level)  ✔
15. settings, including a volume setting with a slider  (collision + background sound) ✔
16. quit game  (In the main menu )  ✔
17. menu  ✔
18. pause/resume and link back to menu (pause, resume,  and main button in each level)   ✔
19. some other UI (dropdown, toggle, input)  (a toggle to make bird disappears) ✔
20. at least two data items that persist from scene to scene  (health and score)  ✔
21. high scores  ✔

All 21 components are included in the game.

Hint: For information how to play the game please click the "Instructions" in the main menu