Star Trek: Tactical Assault

We all saw The Wrath of Kahn, right? Kirk wins the day by thinking outside of the traditional, flat battlefields we know today. His opponent doesn't consider that space skirmishes can extend in every direction, at any angle, at any time. So why is everything in Assault confined to a flat plane? Enemy ships (of the Klingon and Romulan variety) fly just above and below you, but this is more to keep them from bumping into you than it is an attempt at strategy. Come on - we have remote-controlled toys that can at least go in reverse (and there's even one that will climb a friggin' wall).