Graphics might not be great, but the special effects make up for it. That said, game-play theme feels smooth, in a sort of one shot echo, sort of game-play loop. Which is also interesting.
The downside of hot having an artist :'( Thankyou for the review!
Don't worry about it. I went simplistic shapes and curves myself as well, so it's not the end of the world to be concerned with.
If anything, you did a notch more than me, with the special effects. More than anything else. ;)