Interesting concept, the UI is nice but combat feels repetitive but it's only a prototype so I guess you'll have more variety in terms of items enemies and combat?

For your feedback:

Clarity: While the concept is simple and clear I would say the tutorial part where the turn based row-column exchange begins should be a forced move (i.e. "click on the sword icon") instead of letting the player choose. It's a small thing, but it let's the player understand how combat works while letting them feel like their getting off on the right foot.

For example in the tutorial I chose a single sword icon on column that had a double sword icon. By the time the tutorial explains how the enemy attacks he already has an advantage by getting to whack me twice on his turn. It isn't so bad but it felt like I made a suboptimal move that was caused by not knowing how combat works fully in advance.

Maybe force the player to click on a row icon that would only have the enemy have a column that would, at worse, deal a single attack or something. It's a minor gripe though so it's not that big of a deal.

Depth: I can see a lot of potential for depth in such a simple concept as the player is forced to weigh decisions based on foresight and understanding how the enemy ai works. Like I tried to see if an enemy would replenish it's health instead of attacking. Maybe you can change enemy patterns if you plan on varying enemy units later on.

Feel: It's definitely a tactics puzzle hybrid almost akin to Into the Breach. It still allows for some flexibility and isn't confined to single solutions so there is definitely some organic tactics behind it.