I think you achieved your goal of making the main character feel weak and vulnerable without having monsters in your team.
The creature designs and animation are quite unique. It would be good if the design of the monsters visually convey their role or abilities in battle, e.g. look armored or tough if it's a tank, cobra or lizard that spits projectiles... etc.
Currently the game appears to be a survival game where you play until you die, but it might also be interesting to build up your monster army in order to defeat a final boss.
Good effort, keep making games!