Pros:

• Interesting mechanics
• Well realized tutorial

Cons:

• No audio
• Several small annoyances

Here & There:

The tutorial was nicely done and explains the concepts of this game well, and the mechanics of the game definitely are interesting. There are a bunch of little things that grated on me while I was playing. The end-turn button should be mapped to the keyboard or a mouse button because moving to it and clicking is a chore. The accuracy of the mouse clicks seem off, as if there's overlapping hitboxes. The lack of audio is a bummer but since this is essentially a puzzle game it's not that big of a deal. Dying and restarting is a bit much too, considering the fact that the solution to the earlier rooms don't change, so you're making the player re-do something without a challenge. I did end up doing much better on a replay of the room with all the pawns, but it wasn't satisfying enough being more efficient to justify forcing the player to replay something for failing later. Also, the HP pickup in the Light Room gives 5 HP but it takes 3 or 4 HP just to clear the room, so it's actually a 2 HP pickup which is almost like the pickup is lying to you. This was a simple and interesting game that polish would help elevate a lot, especially with more levels.

The door seems to be bugged.. if I interacted with it before completing the level's goal, once I had completed the goal I could no longer interact with the door.

A really neat idea but the execution is ultimately kind of annoying. Having to click "End Turn" after moving one square every time got irritating quickly, especially when there were no enemies on screen. 

The lack of animations and sound make it very hard to tell what's happening between each move.

Something to consider might be using the rules of chess to help you set up safe attack moves. For example, attacking a pawn from the side you'll take no damage but if you attack them from a spot they can move to in chess you'll take damage as well. Because you take damage every time you attack, as it is it makes it nearly impossible to clear the full dungeon. 

What you did though I thought was pretty neat, I think the idea has potential

I do like the idea of incorporating chess rules into something like a dungeon crawl, but yeah, a keyboard shortcut for ending a turn would go a long ways.

It also might help to have attack ranges drawn for enemies as well.  I can understand if you'd want to keep it off to make it more chess-like: you have to KNOW what you're getting into, but maybe it could be a toggleable thing?  In any case, I died in one of the stages and had absolutely no idea why.  At very least, like someone else said, some attack animations would really help to clarify things.

But it is a really neat idea.  It just needs a lot of quality-of-life changes.

Conceptually I like this, but the actual playing of the game ended up being really frustrating. Having to move my mouse back and forth between the king and the end turn button when the king was the only piece on the board got annoying fast.

If you release a new version where that is faster, either a keyboard shortcut or automatically ending the turn when all pieces have moved, I'd love to give this another go.

Nice effort! A little buggy, though. I thought it was a little confusing the way I could keep dragging the king/other pieces outside of their normal movement range. 

I think it could use a few simple animations to communicate what is happening. I would try moving pieces around and then just suddenly they're dead! Animations can be nice because they communicate what is going on, they're not just for flash anymore. 

I found moving the king every turn and then manually clicking end turn was a little tedious. Maybe you could detect when all the pieces have moved and just end the turn automatically? Anything to reduce user clicks is always a thumbs up. 

I think this could benefit from sound sound effects! The way I see it, there's two ways you can go with this: 1) the pieces are plastic-y and they make chink sounds as they attack and get attacked or 2) the pieces are basically warriors and you hear the klang of metal on armor when the attacks happen. Not to mention some light SFX when the pieces move. I think stuff like that would add a lot!