Pretty, the brightness/yellowness of the greenery could be tuned down a little, its overpowering. Choosing where to use the darker shades (and doing so less uniformly) would really help give the trees some volume.

in addition to some more bg variety, im sure we would all enjoyseeing some enemies or additional characters thrwn into the mix to make things more ineresting.

omigosh! ive been trying to pull off nice grass tiles for a long time an dhaven't gotten very good results. you on the other hand, are quite good a platform tiles.

looks pretty cool so far, but I think the trees in the first screen should be a different colour, just to stand out from the grass, and I think in both pieces some extra details in the currently empty ground might make it a little more interesting.

Adding a few extra tiles to the BG and basic ground tiles might also spruce it up and break the repition a little more. Nice style so far though!

 Man, I really love this.

The trees are so awesome. Great job!

Hey that looks neat! But it lacks dynamicness