I see you used Finalbossblues's Time Fantasy pack, that's awesome! I love those sprites. ^^
However, there's too much contrast between your own sprites and the ones in the pack. Try paying attention to the amount of pixels shown in the original tileset, as they're not exactly 48x but a resized 16x.
View attachment 899745
Lemme take this screenie as an example
. As you can see, the little hut in the middle looks slightly blurrier than the rest of the map, and that's because you're using single pixels instead of triple pixels like in the other sprites. This breaks your game ambientation entirely.
That's all I can say right now as I haven't tried the game. ^^'
I'll try to give you some more advice when I finish testing the game!