This is quite an interesting concept! I like the combat mechanics and that you can't just constantly shoot, it's a cycle of picking up and throwing the rocks. I do think that the difficulty could use a bit of tuning (or I'm just terrible at the game lol) because I kept dying on wave 2! Also, occasionally the cursor lines up with the rock but you don't grab it, some weird perspective thing. So maybe an idea would be to change the colour of the cursor if it lines up with a rock. Anyway, quite an interesting entry :)