A really fun game! However, as I built up speed, I went towards the top of the screen... I had less time to see the spikes, since I was faster and near the top of the screen... I always died really quickly when that happened. I think it would be better if the game kept your character near the bottom of the screen, and either showed more area, or zoomed out as your sped up
I found the centurion helmet, but it hasn't been added to my list of equippable headwear... (I'm assuming the centurion helmet is equippable since the silhouette matches)
BUG: I answered the first riddle guy's riddle correctly. I then reloaded (without saving) and when I went back to him, he said I had answered his riddle correctly.
I did the very first Guardian quest... and it locked me out of every other Phoenix quest. Doing the first quest shouldn't lock you into one, to give the player time to find out about each side more. After the 'report to the commander' you should be locked in.