IMHO call the hobbies slow because of time at less than 100x speed is a waste of time. The game has the achievement up to 2048x speed, them players have to think if they want to go on for double multiplier waiting for long time or get a lesser bonus in quicker time. Choices of gaming style, but please before complaining in a game, before think of the nature of the game. This is a marathon, not a dashing run.
Very interesting game and funny to complete, both as archievement and levels.
I go check if there's a Building Rush 3. And, maybe, a better improvement is a free game mode for beat a screen collecting up to a total cash in hand after you've "golded" it as a "time attack mode", where you have to win and the time you use to complete it is your target. The faster, the better. Just to add longevity to a game already funny.
The only great use of MJ zombie is that I gain time for collect cash around the cities. :D I use it only when few citizen remain and then collect cash. Bad idea? The better I've found. :P
 "Crush Crush"){kind=icon}
 "Building Rush 2"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}