i like this ones.  

awesome trees

Looks pretty good, but the shape is a bit regular and round, and I don't really like the truncks. Also, with such big trunks, you should have a lot more leaves. 

The one in secret of mana is better IMHO, because the colors span a larger value range, your colors are too flat. But I guess it fits the rest of the game palette.

I would also add slight yellow tones on the lit side.

 It's a bit weird that every tree has same colors with same type of leaves..

Very good job :)

I dont think soo, they are supposed to be 200x200 and DEAD trees.. Imoose it look soo good the colors and lights, congratts

 It's for the weekly challenge? Btw, very good.

 experiment with colors other than purple.  I bet you could find a few other cool ones for different stages (night/day, warm/cold, rainy/dry, etc)

 These are fantastic good job.