[Spark910]

It's good that you have used a lot of different objects, but try and make your own by selecting 1 tile at a time, rarther than pre-built objects.

Also, generally putting a lot of the same tile/object together isn't so good, so try and put different things together/more spaced out.

And finally, most of Graals levels have a fair bit of blankness to them, so don't just try and fill every time. Flat grass is allowed! (plain green stuff)

Someone else will probably reply telling you how to join trees, as that's needed in your level. But you could try and save a level/get one from someone with joined trees to see which tiles are used.