I personally thought that this game was actually quite unique and genuinely enjoyable. First of all, the game had quite a diverse loot-pool, not as bland as something like Minecraft where you can basically only get re-textures of the same sword and not as chaotic and confusing like Terraria where you can use a toxic dead fish to shoot missiles out of your eyes. The loot-pool has many weapons but they all match a certain theme and although some games are fun just because of how random they are I feel like the selection of realistic medieval weaponry and armor was a good game-design choice for Ezmore's Crystals.
Second: Difficulty, I personally thought that the difficulty was EXTREMELY well balanced, as a game developer myself who likes difficult games and finds himself constantly accidently making games 100 times more difficult than any biological human apart from the person who playtests the games for hours (me) could adapt to I was really impressed, the difficulty curve is very smooth yet still makes you struggle, AND you hardly ever feel like it is 100% your fault that you died.
Lastly I found that the map was very diverse and I was able to find little points of interest in every little corner on the map, and I was never disappointed.
Now the negatives, I have 2 main complaints: Visuals and controls.
The Lego style was very nice, BUT I personally thought that due to the lack of any sort of post processing (bloom, motion blur, color correction) the game interface just didn't feel good to interact with, I also found the lack of responsiveness also quite unpleasant, it is hard to feel like damaging impact of a hit, or the strength of a strong enemy, because this game lacks any sort of "juiciness", when I get a powerful blow on an enemy, make the screen shake! make him fly back with a trail of particles! when I get hit, make my screen flash red! make my health bar flash! this isn't very important but I find things like that really make a game go from immature project to steam release.
The problem with controls is quite simple and it's probably only a nuisance for some people, the fact that you walk around by left-clicking and not WASD, and to make it worse and you attack by left-clicking too! I understand where the developer got the inspiration though so I won't judge too much.
Overall, its quite an enjoyable experience: Fun character interactions, interesting map, and constant new things to do 7.5/10.