You were right, this game is pretty addictive. I liked how i was given the option of whether I wanted sound effects or music to be on. The interface is really quite nice. Another neat feature is the different types of objects you can have explode. The new options aside from the original are neat!
You should have one key to control the entire game. It was annoying having to go between the enter and space bar keys to restart the game, but I guess that's just being a little bit picky.