I like the game, and love the blue sparkle laser. But, I now went through the maze twice. Once to end up at the other end and being blocked by a door with a key I don't have yet. Now I'm back at the start (or not?) and are blocked by two doors with a key. I don't feel like going through the huge maze again. I would definitely change that or provide come directional hints, because now it's just frustrating.
Also, I triggered a robot behind a door which started firing and now I hear him firing constantly, even when going far away from it. Really annoying :-)