Fixed some assets
Further tweaked the spider, so that it can now latch on to bats as well, albeit, poisoning and killing said bat after a set amount of time
Snakes now kill spider, rather than the other way around
Added more spiders to the levels
Spiders now stun all human enemies proper
Fixed some minor bugs, such as the left-most wall on level 4 and a few texture-bugs by the waterfall on level 3