@Kyrator, the doors work perfectly fine. When you're standing in front of one, you press W or UP arrow. You will be brought to a screen that lets you decide if you're leaving the tower, or continuing. It's in the instructions, please read them to avoid such confusion.
EVERYONE, PLEASE UPDATE YOUR FLASH PLAYERS TO THE NEWEST VERSION. Anyone experiencing issues with any flash game is almost always because your flash player is out of date and cannot run the game, PLEASE update.
http://get.adobe.com/flashplayer/?promoid=BUIGP
Awesome game as well, great controls, awesome weapons and good execution overall.
PLEASE READ, I'M THE CO-AUTHOR
First off, thanks for all the comments everyone, greatly appreciate the feedback and compliments.
For those of you with issues with the collision detection, please listen. First off, you are meant to go through blocks, it's not a glitch, it's a core feature in the design of the game, it's meant to be that way. As for collecting gems, the collision was programmed to be pixel perfect, in this case when you experience issues it's because we made it TOO exact.
IF YOU ARE PASSING THROUGH A GEM WHEN GOING UP AT IT, TRY FALLING DOWN ONTO IT, YOU WILL THEN BE ABLE TO COLLECT IT.
We are aware of what flaws this game does have and we will address all of them in the sequel when the time comes. For now, please read the instructions and enjoy the game for what it is, thanks a ton.