Beats of Rage (BOR) (Testing Only) Very slow. Game

Beats of Rage (also known as BOR) is a open source 2D customisable video game engine designed by Senile Team and inspired by Sega's classic Streets of Rage series of beat'em up games. It was initially released as a video game tribute for Streets of Rage 2 with characters from The King of Fighters.
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" ,"Enter" and "Space bar".