cool beans, reminds me of Metroid. I don't understand rain and thunder, because I'm guessing this is space, but it actually works rather well. the rain reminds me of the track from rainymood.com, check it out.
There are more storms in space than you can count my friend :-)
Sorta sounds Starfox 64-ish, I like it.
Please contact me if you would like to use this in a project. We can discuss the details.