I'd describe this game as video game fast food.
The controls and combat are just enough to be enjoyable, but never go beyond that.
There's no real story other than "These things are helping me clear evil growths."
The art style and aesthetic has charm, but stays the same throughout, making it get kind of bland after an hour.
The over world I feel tries to have the feeling of being open, but fails overall. You're essentially just pointed in a direction, only to press a button and it opens up another path. Maybe there's a side path here that leads to upgrade materials, but never anything interesting.
Walk foward, press button, neuron activation.