This is easily one of the most polished games I've seen so far in this LD. The blooming flower, the smooth camera movements, the energy gestion... The level of details is damn high, yet you succeded everywhere, as your game is gorgeous, moody, challenging and downright interesting.
Still, some points could be improved. I'll just quote Julian Ceipek who nailed it :
"1. The root growing graphics should be smoother and make the location of the root more obvious. While playing, the split point becomes ingrained in the player, but I had to look at the root out of the corner of my eye because the twisting was actually uncomfortable to watch. By the time I finished the game, it took me a few seconds before I stopped having the impression that the game player was rippling.
2. The cool-down time for splitting needs to be made more obvious, or removed. Every time I tapped the spacebar and nothing happened, I felt that the game had unpleasantly ripped control away from me.
3. The level layout needs to be apparent at the start. Angry Birds does this very well with a panning animation. I think that would work well here, too. "
Also, I still think the difficulty curve may be a bit high and more variety wouldn't hurt : maybe for a full released version I hope you WILL do someday !! :)