Originally, episode one was shareware, while the other episodes were available only upon registration. Moonlite Software has since released the entire game as freeware.
This Video Game contains examples of:
- Bizarrchitecture: The "castles" look nothing like castles at all. They're abstract geometric constructs of flashing and fading animated bricks and blocks of various sizes and colors, with equally abstract "skies" in the background.
- Control Room Puzzle: If a door is not opened with a key, it's usually opened this way.
- Easier Than Easy: The lowest difficulty setting has Clyde being invincible (until a brick he removed reappears into him).
- Episodic Game: There are four episodes making up this game, though it's not apparent in the actual gameplay; the game simply starts at level 1 of the first episode straight away, and finishing the final level of an episode immediately sends you straight to the first level of the next episode, with no mention whatsoever that you completed an episode.
- Falling Damage: One of the reasons for the game's difficulty, especially as there are places where it's unavoidable.
- Frictionless Ice: Clyde slides indefinitely on ice at a constant speed in the direction he's facing.
- Gotta Catch 'Em All: Clyde has to collect all the stones in each castle in order to proceed to the next.
- Gravity Screw: Touching an anti-gravity switch causes gravity for Clyde to reverse, until he touches another such switch.
- Inconveniently-Placed Conveyor Belt: Almost every level, starting with the sixth, has these, often with low ceilings preventing passage against their directions of movement. Many puzzles involve changing this direction, or stopping them entirely.
- Interchangeable Antimatter Keys: Averted. One you get a gold or silver key in a level, you can open all the locks of the same kind in the castle.
- Locked Door: You will encounter a number of these, and you must find the key to unlock them and progress.
- Marathon Level: Every single level is a gigantic labyrinth with several hundreds of stones to collect.
- Mercy Invincibility: Averted. Any contact with a hazard causes your health to steadily decrease, at a rate depending on the difficulty level.
- No Antagonist: It's just Clyde going through these castles and trying not to run out of energy.
- No Plot? No Problem!: There is no explanation for why Clyde is going through the castles and collecting stones.
- Scenery Porn: The abstract and colorful "castles" are built on this, with flashing and fading animated blocks everywhere.
- Springs, Springs Everywhere: Very ubiquitous. They send you a bit higher than the height you fell from, so there is theoretically no limit to how high you can jump with them.
- Temporary Platform: The final episode features platforms that temporarily vanish at random intervals.
- Tube Travel: Starting from the 8th level, there are tubes that transport Clyde around. They can be traveled both ways.
- Unintentionally Unwinnable: It's possible to get trapped in certain pits that's too deep to jump out of (and with no lava or spikes to commit suicide with), especially while gravity-flipped.
- Violation of Common Sense: You're sometimes required to step into lava to get to certain areas.
- A Winner Is You: Winning the game just gives you a message saying, "Congratulations! All Castles Complete!", and then the game tells you the number of attempts and time spent on each castle (accompanied by screenshots of the castles).
