Beautiful game, both visually and mechanically. Very nice sound as well! Although, regarding the sound, perhaps an engine sound for the ship would've been good? But that might be up to taste.
The game plays very well. It really captures the spirit and design of Crazy Taxi. Definitely very hard to say anything negative about this game. Like some of the commenters below, I could note that the ship might be a bit too floaty at points - although, that's part of the experience. The environmental destruction can similarly be somewhat rigid if you haven't built up enough speed, and that's about it.
Amazing job!