I actually kept playing until I scored 1,015,000 coins. The poor german guy needed to go home with at least a little bit of money after all that effort :D
Having just played level 6 and died multiple times surrounded by gigantic squares, I can indeed say with all honesty that this game is definitely about how much 2DArray hates you.
Phew, finally completed it. That feeling when you do that huge difficult platforming bit and reach the triangle, only to die when you hit the bottom and realize you forgot to save and now have to do the whole thing again...
The first phase of the battle doesn't seem to be too bad - hit him until just before his eyes go white, then run behind him so you can push him forwards and dodge the lower beam. The Skull, however, is hard as all buttocks. I shall keep trying!