The crosshair being shaped like a turtle is a nice touch. I think it would be better if you could move while shooting / reloading. And maybe consider giving Neuro a more unique weapon instead of a generic handgun.
The idea was that this is Neuro's V1 model, using a handgun with 10 bullets a magazine. After the first few waves you can evolve into NeuroV2 or into Evil Neuro, player's choice, with different weapons and the ability to attack while moving. Thanks for playing and for the feedback.