the models look really good...but the level, needs tons of work...make the buildings more detailed instead of just big blocks..use diffrent textures for each building...try scaling the street texture down a bit..or change it all together...and add better lighting...the level seams way to empty, add more static models like props and what not...try not to use the same models over and over agien..maybe since its a street/city level try adding parked cars the player has to jump over or maybe ladders/platforms the player has to climb in order to get over areas of the street that are blocked off

Daniel