ok, I let my computer sit at your page for a few min and I got the reel to start. Your work is not bad, but I think you should think bigger for you models and enviroments. Games are able to handle much higher poly counts now, and with normal map technology you should maybe have a few different versions of a model, like an in game version, and a version that is super hi-res for generating normal maps. In general I would not get to caught up on keeping your models less dense, just a good mesh and a great modeling talent is more important.
Also the rotation of the models seemed a bit fast for me, might try doing a simple looping animation for the model instead of the standard turntable Da vinci pose.
Looks pretty good though