Hey man, looks like a good start so far.

Watch the image sizes that your posting, there huge man! On a 1920 x 1200 resolution I still have to move around to see them, as in the image sizes post try to keep them to 640 x 480 (I think).

Any who on to your model, like I said looks a good start, I dont know much about games modeling but the textures seem to be the thing that pretty much makes it or breakes it.

On a side not you can set up level of detail in maya, so that the further away the camera is the less detail is shown (great for large scenes!) dont know if it will be much use to you but its worth a look in the help files for how to set it up!

Do you have some concepts for the the main guy and the spider as in how your going to texture them?