XorAnd here we have a really hardcore puzzle. So you might wanna skip the review if you're uninterested
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The game consists of 15 levels where you have to collect quite a few facade icons and navigate your way to the exit. You control 2 shield-like sprites, one at a time and you can switch between them almost whenever you like. Sometimes their paths cross, sometimes not. When they do you usually have to do more complex stuff where both the shields play their part. Maze elements include fish (they drop down when there's empty space), birds (these move left when there's empty space), bombs and poisons (explode adjacent tiles), dolls (if you push them in one direction they move until they hit something solid), teleporters, blocks that you can clear only if you move horizontally along them, or vertically, and probably some others.
Like I mentioned, all levels part from the first 2 or 3 are very hard. It's easy to make a mistake and then you have to restart the level completely. Your shields can be killed (for example by getting in the way of a falling block or caught in an explosion). The game itself makes the puzzles better, because in order to scroll right, the screen jumps in 32 pixel intervals and then starts jumping for as long as you keep the joystick in one direction. This can force you to make an error very easily. You can also collect a map of the level which is scattered in 4 parts, but of course (of course!) it doesn't show where your 2 sprites are, so you have to really get the feeling of the level. Also, don't press space by accident or you'll be forced either to watch a replay of the level or exit to the level selector - "whoops!" (as the game tells you when you lose one of your shields
).
To summarize, a really hardcore puzzle, a bit flawed on the implementation, you have been warned!.