Good game. Pretty short---I was able to complete it in an hour---but fun. I would have liked it better if there had been several maps, perhaps with different terrain themes. It didn't feel like I was saving the planet, just one little woods area.
Every year or so I come back to this game and reset my data, earning almost all the awards again. Wonderful difficulty and learning curve, keeping the player coming back for more. A sequel with twice as much content, and perhaps an exp/level system instead of a score would keep people playing for a long time.
I loved every moment of this game except the one when I had found all the triangles and was thinking "aw yeah, time for level 2!" not. Great fun, but far too short. Though I suppose I can't fault you, since it was for the Ludum Dare.