Necro Chess

I really like the concept, you could make some interesting puzzles with it! I was a bit disappointed with the last two levels, since they weren't really puzzles and could be won just by going straight for the King and ignoring everything else. 

There are a few minor (mostly UI) improvements that I think would also help.

 First, adding a tutorial tip (or a few) to explain the enemies' health and turn timer as well as when the Necromancer takes damage. These aren't hard to figure out as-is, but the concepts aren't overtly explained to the player.

Adding some visual indicator of an enemy piece's health. I like that the pieces shake when they're about to move, but I wish I could tell at a glance what their health is since that seems to change from level to level. Even just adding a small number inside a heart to the corner of their space would be fine.

A "Next Level" button. It's just the tiniest bit annoying that I had to return to the menu before selecting the next level.

Small Bug: In the final level when new pieces were spawned (which should probably also be explained) they would occasionally be spawned in something that isn't a space.

Fun, needs more levels!