https://www.youtube.com/watch?v=PCjYaRh4hT0&index=3&list=PLvhWUQw6L-BUyH9WPqSGZA2IP78ldxFsD
In this page, Click the green "Clone or download" button and then
choose "Download ZIP" to download the Zip file into your computer.
After you download the zip file, go to your computer find the zip
file, extract (decompress) it to get a folder.
after you downloaded and decompressed your zip file. You will find
a mac application within this folder. When you double click it, it
can not open becasue the Mac security will report it is from
unknown developer and ask you if you want to open it. Please click
open here.
If the game are not opened, in order to open the game,
you need to go to top left of your Mac, click the apple icon, then
go to "System Preferences" and then find the "Security & Privacy",
double click it. Then you are at the Security & Privacy window,
click the "General”, then you will see the bottom part is asking
you if you want to open a unknown application, choose open anyway
then back the click the game application again, a window will pop
up to ask you to choose resolution and graphic quality, you can
just click “play” to start the game.
after you downloaded and decompressed your zip file. You will find
a windows folder within this folder, go into it and Double
click the windows exe file to open the game. Then a window will pop up to ask you to
choose resolution and graphic quality, you can just click “play” to
start the game.
You need to use Keyboard to play the game.
you will use the arrow key to control movement
you will use the Z key and X key to control player action as button A and button B in NES controller.
you will use the Shift key to pause the game
you will use the Enter key to open the weapon select UI and use Z key to confirm
you will use the number key 1 on the main keyboard to open and close invincibility mode
you will use the number key 4 on the main keyboard to jump to the multiplayer custom level and in this level, the second player can use "O" "K" "L" ";" as movement key and "[" key and "]" key as action control.