Interesting idea and well exectuted.
A most interesting game we have here. Controlling the Tri-achnid comes almost naturally after a little while of playing, and the web slinging adds nicely to the exploring nature of this game to get about.
As much as I enjoyed it, a particular level comes to mind as having an unobtainable grub, so maybe you could help us out: the repel stage has a grub near spikes that you only can get with a flyer bug, but after getting up there, I don't think there's a way to get back down again. Care to give us all a little tip on that stage for a 100% game?
All in all, I enjoyed the game. Original, well designed and good coding. Definitely looking foward to the next installment come 2007.