I'll give you a suggestion, if English isn't your first language, make a game with few things to read.
From time to time, I found myself being misled by the description to the point I almost lose. For example, the explanation with the rogue, it said if you kill 1 you get a stealth buff, that's not true. It is also a good idea to ask someone to check everything before you upload it as well, I got a bit thrown off by wizards, sorceresses & sorcerers , so what are you going to refer them?
The game is fine, though the difficulty is steep & since you can't replay the previous missions to get some, worsened by the fact the troops unlocks can't be applied on previous map, so it's pointless to replay them. I also didn't like the fact there are other mediums getting in the way of getting crystals. It should be made that it's possible to play previous missions for crystals & with unlocked troop upgrades but with lesser amount of crystals to get compare to the first time you completed it.
The worst part is it's really hard to predict the exit points when there are more than 1 exit point for the enemies, making it hard to switch troops around. This is harder when the prices are expensive even with recruitment cost reduced, it seems this can ONLY effect footmen because I filled up footmen & wizard but the reduced cost only apply for the footmen.
I can overlook the fact we have to sell troops in batches than individually, it sits on the line of inconvenience & strategy. I personally would prefer an option to relocate them entirely because it saves time than selling all of them just to recruit the exact same units. I am also a bit confused, sometimes units will run outside of their range, especially the footmen so half the time I'm not so sure about relocating the troops.
The game is fun, engaging, somewhat difficult, hard to understand the description at times. But it looks more like it will be an iOS game so it seems fitting there than this.