Hello, I did try your game.
I like the art style quite a bit.
Unit path finding works great from what i played.
I couldnt quite get into it though, i played the first few levels and my brain just really wanted it to be an RTS type game instead of a tower defense.
one issue i had is once you start the wave whatever units are on the field that is all you get, in a tower defense game usually a tower is permanent, in this game units are not towers and they die but dont come back? all my units died and there was only one enemy archer left, the king did not attack the archer.
My recommendation is to play some popular tower defense or unit management games and pick it apart to see what about them makes them popular.
The original incursion game was a lot of fun back in the day, it had plots of land to put a building and each building had a type of unit in a set of 3 (archer, warrior) and you could upgrade each unit individually, for example the archer building could have two long bow archers and one bomb archer. if one dies they have a timed respawn.
https://armorgames.com/play/14138/incursion
Again i think the art looks great, just needs some meat to the mechanics.