Improved starting area - spider deployment

Got some great feedback and after few days of reviews went back to touch up on a few things, preparing for the build unlock after voting.

Game used to start with enemies rushing you at first second:


Now you have a few seconds to take in the view before you are ambushed:

Should probably move the passive megaspider a bit further away, but could not resist the cinematic moment.

Also added a few more details to boss spider, made a passive variant, moved it to peaceful corner of the map.

First two minutes demo gameplay: