Things you should/could do in the code:
- Indent the code properly.
- Since you included cstrike, you could use cs_get_user_team() instead of get_user_team().
- Callback the menu, using menu_makecallback(), dont use if and elses.
- The replace_all() in the color stock is not needed, since you use ^x0* in your text messages.
Suggestions:
- Make a cvar for the extra amount of health the player recieves.
There is a lot to mention, but start with that.