Short-Term Time Waster
 

I just stumbled across Grow Tower and found it quite entertaining. Part of the fun is figuring out what you're supposed to do in the first place, but here's a small clue. Hover over red up/down triangles. See that light bulb thing at the top?

It doesn't have much replay value (unless you just want to watch the animations again), so it's not a giant time-waster.

Need more of a hint?

I bet I beat it in 120 tries of fewer.

That didn't take long (4 or 5 tries). Fun!

Hey, I was right!

I had it mostly solved relatively quickly, but the false paths were equally fun to explore.