This was pretty good - I like the art style in particular.
A couple of things I would change:
The buttons that get called during QTEs. The player already has their fingers over A and D (because WASD), but the B key is just a little too far out of the way which screws up the pace IMO. I'd suggest just using the directions themselves (as in displaying the arrows themselves, not just the letters "WASD");
Also relating to pace, as it's a short game with the focus on quick reactions, some sort of indicator as to where the obelisks are would be handy, that way the player doesn't get to a point where they're scouring the map trying to find the last few objectives whilst also keeping the hordes at bay.
Also, is there sound in the game? I wasn't hearing anything during my playthrough 🤔
I say again though, I like the look of this so far, it's got a lot of potential 👍