initialize
use AxisHelper instead create lines
add light and modify cube's position
add library keyboard state
coding simple structure
add library requires
create function Init
create cube each time
move player and camera
add plane, light
create cube near player
change name of StateSecond to StateGame
add code about collision detect
modularize method
set state to StateFirst when collision detected
remove enemy if that is far from player
increase player moving speed
to remove scrollbar when pressed arrow key, decrease width of window size
little policing
set movable boundary of player
modify camera style
restart run game