A fun game, but there are some bad bugs when you crash into things. Overall an interesting, pretty early engine game where you control a ship flying around. better to play dogfight by yenrab, I think.
I recently played all the ZZT games made from 1991 to at least the end of 2003, maybe beyond - nearly two thousand games in all. Of those I have selected just 66 to be included in my list of "best ZZT games ever."
This game is well-designed, well-programmed. The thing to note about this game is how it makes a transition from standard topdown adventure to engine game and back again. When I first played this game through I thought that northbase had been destroyed and I along with it. Game Over. Upon replaying I realize that your ship does escape. If it had the ending where it was destroyed, this game would be perfect.