I really liked playing your game ! The concept itself is very interesting, here i noted some points that you could work on :
1-Adding a aesthetic visual effect when you hit or get hit such as a hitmarker to make it easier to see.
2-Adding a mechanic with an option to restart the game when the player dies, could be just a text appearing,.
Besides of that, i really like the concept of the game, i think it has great potential you just need to keep working on it :)