Hey! Thank you very much for the honset review!
First, about the loud monkey death sound, we noticed it was loud too, and upon trying to change the volume it almost corrupted our entire game for some reason, so we had to leave it at that...
Second, about the basic attack, have you tried pressing the Right Click button? Its a melee attack which deflects and deals damage to monkeys (as seen in the tutorial)!
Lastly, about the death transition, you are correct, its pretty confusing, but we ran out of time to create something readable :(
Anyways, thank you very much for playing our game and reaching the end, congrats!