Merge branch 'master' of https://github.com/marblexu/PythonPlantsVsZombies

README.md

@@ -1,5 +1,6 @@
 # PythonPlantsVsZombies
-a simple PlantsVsZombies game
+a simple PlantsVsZombies game. 
+It's just for learning and noncommercial use. If this game infringes the copyright, please let me know.
 * implement plants: sunflower, peashooter, wallnut, snowpeashooter, cherrybomb, threepeashooter, chomper, puffshroom, potatomine, spikeweed, scaredyshroom, squash, scaredyshroom, jalapeno, sunShroom, iceShroom.
 * implement zombies: zombie, flagzombie, coneheadzombie, bucketheadzombie, newspaperzombie.
 * use json file to store level data (e.g.position and time of zombies, background info)
@@ -7,7 +8,8 @@ a simple PlantsVsZombies game
 * support night level
 
 # Requirement
-* Python 3.7
+* Python 3.7 
+* Notice: python version 3.7 is advisable, but not required. For LINUX: if your Linux system has a preinstalled python 3+, it's ok to run this game. Updating to python 3.7 directly may break LINUX Mint.
 * Python-Pygame 1.9
 
 # How To Start Game