I'm unable to declare that “Space Cadet,” a zany, silly, family-oriented comedy, is genuinely worthwhile, however, it does provide a considerable amount of goofy entertainment. The film has the feel of a Disney Channel production intended for an older audience (similar to "RocketMan" from 1997 — not the movie about Elton John), but amplified significantly. It’s nonsensical, yet still somewhat pleasant to watch, parti…