I agree with Midnight dragon and odinXRIGHTXEye
To add on to what these critics have said i personally thing their should be a little bit more variation in the drumset groove. Doesn't have to be much but i think a little variance will help. Overall i think you bring out the feeling of an acid trip really well, however it feels more like an acid trip will at home on the couch. A good piece in terms of portraying an acid trip which is why you received the score you did. Keep at it.
I think you captured the old school style guitar sound well in this but you really need more to the song. the guitar is so much louder than the other instruments that it seems to be the only thing you hear and I think that may be what is causing the song to feel so bland.
Try adjusting the instrument volumes a bit and get them to blend a little better and you will be on to something.
It has a Jimi Hendrix feel to it. soloing an entire song gets pretty boring though. keep practicing.