it took me a while...
...to figure out the 'free' ending but it was worth it. Great game. I didn't like that much the fact that there was medals to get for doing the "listening to the voice/ stupid thing". In my opinion medals should be just for the "alternative" ways of doing things. I liked a lot the whole voice talking to me deal.
One small issue that doesn't affect the game but maybe you'd like to know is that in my spanish keyboard i have a key for the ñ letter (ALT+164) and pressing it causes a flixel screen showing the frame rate to apear. It wouldn't be that much of a big deal if it wasn't that the game lies to you and has you trying to figure out the keys to play it and accidentally hitting it.
Again great game, keep it up.