I don't know or have an application to open the .rar file, but I went to the game page to check it out! I couldn't see all the text for Play Controls Quit. It would be good to also add instructions on how to exit the instructions screen. I figured it out and pressed esc.
I like how you included this for multiplayers, but single player would also be nice! It was easy to push P2 off when I was the only one playing! The art is great, just wish the characters were bigger!