I concur; great, clever and effective adaption of that tileset for the tree. Well done! Kind of imaginitive, clever use of a tileset that really impresses me.
The banners in the second screenshot look a bit lame, however. You've done a fair job with what you have but it's not a fantastic tileset. If you're able, it might be worth drawing your own. You can make them into COs and put them on layer 4 if you don't have tileset space for them. Just an idea.
If you're using KS+, I've made moving CO versions of the knyghts that you may want to use. Tell me if it is so and I'll post them. Or you could use them as I did in 'Do Not Pick Up The Key v2' where they will appear as unmoving COs in regular KS and be animated in KS+.