The reviewer below me said this game is very similar to the crab game, and I agree. In fact, it was the music that gave me a sense of deja vu. Sure enough, I check your games, and there's the crab game.
Same music, same layout and very similar achievements (with slight variations) - including the one where you have to purchase 40 (50 in the other one) top upgrades which get exponentially more expensive. A single upgrade from 14 to 15 taxis costs $27295.
The beauty of idle games like Cookie Clicker or Clicker Heroes is that there are more passive bonuses and further upgrades to increase the clicks per second. But with this, when I spend all of my money on a taxi upgrade, I get an exponentially smaller return. In a better designed clicker game, at this point, I'd move onto a stronger upgrade that will offer better click per second for cash spent.
This does not make for a fun clicker game. I dread to think how long it would take me to achieve the final medal, so that's where I'll stop playing.
As for the presentation, it could have done with some animation - mindlessly clicking on a taxi to simulate a taxi business is a bit unimaginative.