I've never used Blender Player before so I'm probably missing something, but I click the green icon "The Apprentice.exe" and nothing runs. I see a black cmd window pop up for a second but then nothing. My artist can't run it either, but neither of us have used Blender Player before. We're both using Windows 10.
The game looks really neat, and it's really cool seeing games made with Blender. I love the idea of mixing together concoctions to unlock portals. I also am a sucker for wizard type characters, and the UI looks really polished, I really love the look of this game. Looks like a great submission!