Earlier the game used to lag whenever you or the enemy used any magic attack. This was because Renpy took a lot of time to cache images to be used in an animation. And in case of my game Renpy was not able to predict images because the image displaying code was in an 'if' block which depended heavily on some custom battle logic which I fabricated. :)

So, I have reduced the number of frames and increased the time interval of each frame and now the game does not lag or stop when any magic attack is used. I have also compressed the images very heavily without losing the quality and it has halved the size of the game. Enjoy playing it. ^_^