The graphics are basically 0 textures... And you managed to make it look amazing with shaders, particle effects and whatnot. Nice!
The gameplay starts off pretty slow and easy, which is really helpful since you don't get overwhelmed with difficulty early on. However this has a huge downside as well. Since the game starts to pack a challenge starting at about 800 points, it is painful to wait that much just to enjoy the game at its fullest again.
I had my fun playing with it, which means you've done a great job. This is the goal of the games, after all. :)