I hadn't played Galaxy Force until the 3D Classics version came out, but it's still got that arcade spectacle, all these years later. Everything is made up of scaling sprites as you pilot your ship through asteroid fields, lava-filled caverns and through beautiful cloudscapes, but the effect is convincingly 3D, especially with the added visual depth.
Gameplay-wise, it's a lot like AfterBurner II, only slightly slower and with more control over where you can fly. It's still essentially on-rails, but you do get some route options and there are obstacles to avoid, which Afterburner doesn't really have (canyon walls notwithstanding). The shooting itself obviously took second place to the spectacle of the action in the original, so it might not hold your attention for long, and there is also some slowdown, especially with the 3D turned on. That said, it's a showcase for 3D depth, even if it is far too deep on the highest setting. Stick it on half-way and you should find plenty to like here.