I enjoyed the simple graphics but I found it hard to interact with the bees without taking damage. Tried jumping over them but the jump was not high enough.
I got to the part with the orange bees which came down and then stopped moving all of a sudden. I shot them all out of the air but I was unsure how to progress further. Both portals did not seem to work and my jump was not high enough to reach any of the platforms.
Still curious to why the lake is yellow though, are the bees to blame or is it the nastier option I first thought of ;P