Okay so I have been going back to some of my old XBLA games to pick up some achievements, and dear god Rez HD is hard. 
 
I just can't seem to complete Level 5. I can get as far as the Bosses, but inevitably get beaten by the time I reach the final form...  
 
It's really frustrating, as I completely love Rez HD, and feel wrong having not completed it... Anyway, I shall endeavour to do it by the end of the week. Wish me luck, and any tips are much appreciated!