The thundering effect is nice and all, but that one sound keeps looping over and over again. It was nice for about 30 seconds but then it kep repeating which dropped your score.
It was cool untill...
The guitar riff is pretty good, the looping of it is alright.
The only problem I would bring up is the weird keyboard riff.
Other than that everything was good.
Also, maybe lay off the lightning effects.
Overall, good job for this being when you were inexperienced.