What you have made is really cool. especially the blender part. I see 2 issues though. if it was to be a massive game.
1. If you wander for long. The amount of inactive objects piling up grows out of hand. A suggestion would be to save the values as a player pref or something and then recreate it if you should return to them.
2. if you wander for too far. you can get to an area where unity based programs renders stuff badly. try 20000x,0,0 and move around. A solution to this would be to normalize the positions once a while.so you technically are moving around in 100x,100y, it's just treated differently for the code.