Disclaimer: I played the older build since I'm not sure about the fairness of rating the late build.
The idea of the player making the enemies themselves is definitely original and interesting, though I didn't feel like I had control over which enemy I was planting so there wasn't really room for strategy other than in their timing/placement.
It seemed towards the end of the round that my gun was firing very slowly, so there wasn't anything to do but kite the enemies and wait for it to recharge. Some visual indicator of how many bullets I have left or when the gun is charged would be helpful.
I love the visuals, very cute & coherent style.
Nicely done :)