Great tileset, and I'm using it to create a background for my game. Definitely
A few small points of feedback:
- The shadow for the stairs seems to be missing from the pngs (the ones going from bottom middle to top left at an angle)
- The shadows require you to have transparency for them in your toolset, which mine (ogmo) doesn't support. Partially transparent images would be better, in my opinion
- The bush tiles aren't spaced far enough apart to use as 32x32 tiles - you'll end up with the left part of the next bush in the tile of the right part of the one you want