After you get to a flying bug you eventually find a very tall mound fly up and jump off.
Then roll untill you find another flying bug. Use it to fly over all of the spiny fences (Don't go over the fence a bat will eat you) And finally get to the finish.
Also, Level 5 you get on a flying bug and Press a button (I'm not sure which, sorry)
which shoots a firework. There is a bee hive that you must set on fire. (Hope this helped)

same answer

how do you defeat the king ant in level 10???????????

Once you find King Thorax (that's his name), you can't kick him while the fire in his
crown is on. You need to make him follow you to one of those dark columns that are
everywhere (they're actually water pipes). With him close by, kick the water pipe, and
water will spray everywhere. This will put out his fire, so he is vulnerable to kicks.
Kick him until his fire goes on again, then you have to spray the water again. (PS Bugdom
is the best game ever)

He's invisible use water pipes and then use the mouse to use rush walk and click and then
you should soon beat him(PS Go Rollie Mc Fly

Why are there spiderwebs and spiky things in level 4?

Because they hurt you.