Some alpha could help the graphics. Also, it would be nice with a reset button instead of a completele application shutdown.
There seems to be a problem with the boundings too, of the character.

Hehehe, I could never go for more than 5 seconds

Alpha is transparency channel. JPG doesn't support alpha channels so you will have to go with PNG (there are other choices but PNGs are the most popular).
The FPS went all over the place, it would go really fast and suddenly slow down and then speed up again. Try bounding the FPS instead of letting the game loop run wild.

Restarting instead of closing could be simply implemented by having a "start" screen that says click to begin. Try playing around with the code to figure out how to implement that

Ra4king, would you mind helping me implement the opening screen? I tried all night yesterday and couldn't get anything going.

I also tried the FPS cap, but couldn't get that to go smoothly either; it just ended up looking worse.