Quite an interesting game idea and execution on the theme. The only big issue I have is not having a ton of direction or some sort of tutorial that I could use to better understand my objective from the start. I really only figured out the flower being able to give you a game over when the slimes attack it by my first game and the fact that weapons use you as ammunition as well.
The weapon variety is actually really good, and the means of using them is really cool. The only other thing I might point out is that the grass being so detailed kinda made the game a bit harder for me to read, and you might actually have better game visibility if it was a little less detailed.