What do you mean by higher framerate?
Also, about the lag, I don't know, my friends played it and didn't experience any lag. Yes, the movie clip is removed, else that would be a giant lagfest.
I'll make a way to restart the game, probably at the same time as fixing the game over screen. For now, I just reload. I may be adding some other things to, like a high score mechanism and things that give you buffs, like increased speed, or the ability to "jump", etc..
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Since this post I have grown smarter and I found out how stupid I was three years ago. I'll make the framerate better in my new version.