lol blyndid's right. The same thing happened to me, but I missed the very last star so I had to complete the game all over again anyway. I did get utilize the glitch(?) since I couldn't beat the final boss in one attempt anyhow.
i ,made it all the way to the last stage on impossible and died before the last boss :((((
-oh cool all you have to do is beat the last stage because all the locks are still open, big oversight for such a rare medal :)
I would so, so, so much rather you had made the "harder" levels harder (e.g. more enemies, more spikes, etc) rather than subtracting check points, which only really serves to make it more disappointing for those who wanted all the stars.
You lose half a star for that but the Normal Mode was very entertaining.
its addictive i keep coming back for more.
though i hope you plan on putting a save option well atleast after finishing a stage