Love the style of the game! The controls are nice and smooth, and the colors and the UI design is neat! The art is consistent and crisp, and the idea is unique. The gameplay itself is challenging and pretty fun! I will say, the attack is a little hard to aim, and the "zombies" are sometimes too fast.
I do wish the exposition was a little better, as I was confused about the setting and wasn't sure what was going on before the power turned off. Also, the text boxes felt a little sudden at times, and broke up the pacing a little.
Overall, great work! A lot of potential to open up this world!