Truly Awesome.
Spinning webs anywhere is truly awesome. You can walk along your webs and create shortcuts. Also, if you're stuck on a level, spin a web and stick your egg sack to it. Then connect the spare end to a floor or wall, and do the level without it. Then you can constantly spin shortcut webs and climb all the way back after you get through quickly.
I've had an idea for improvement on the webbing system - Have Q to cut webs and ctrl to make new webs. Then you can create network of webs, and a web leading off of another web. That would rock.
The music gets repetitive, maybe add some other music to the game as a midway change point. I know the music changes inside the monster but it needs to change midway as well.
The rappelling level needs better instruction, on almost every forum or discussion there is someone complaining they can't do it. So here you go.
Press Ctrl to spin a web. Attach the end of the web to the rock and leap off, with the other end still in your mouth. When you go down far enough, hold space and grab the web with one of your legs and release the mouse button, still holding the spacebar. Then get one of your other legs and stretch it towards the other platform to move yourself. Grab onto the platform, release the web and attach the web to the new platform, so you can get back if you need to.
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Awesome game, can't wait to see the next one =]