Great job, super satisfying to play. The character and UI work was particularly nice. Having to swap characters to defend was a great mechanic, once I figured out that's what I had to be doing. I think you've nailed the balance of controlling a squad without having to micromanage too much - it reminds me of combat in a good tabletop RPG where you're swinging the spotlight from one character moment to the next rather than having to hyper focus on all the big picture details. To that end, having more reasons to swap between the characters would be great but I'm sure you already had plenty of ideas for that which were cut for time.
Great work!