It's a bit more brutal than I intended, haha. I started working on the enemy code very late so didn't have much time before the deadline to balance it. To try to compensate for this the current build will (secretly) increase your maximum health every time you retry, so it gets easier over time.
I'm planning to at least release an update adding some sound to the game and will probably try to rework the combat a bit at the same time to be a bit more manageable.