I love the art style and the concept is super neat. Very interesting limitations on the player. My main feedback was it was hard to figure out how to actually attack at first. I might have missed something but for five waves I kept clicking space and numbers and only realized you have to use the mouse to attack after the 5th wave without collecting anything 😂. I do notice it mentions it in the description now but it might be worth having a more clear
Left Click - Attack
with the rest of the controls for skim readers. Great job!