I have both very strong positive opinions and very negative opinions about the demo.
PRAISES:
The art style is great, and the soundtrack is FANTASTIC. The main menu theme is absolutely blasting, and the in-game music gives this great feeling of adrenaline.
Killing zombies is very satisfying (great gore and sound design), and using the special weapons is even more so (though the strawberry laser should be much louder).
While I personally don't expect the plot to be well written, it doesn't need to be; the humor shown in the trailer and in-game is great, and I look forward to all the campy one-liners.
This may not be important to some, but I appreciate how the tutorial was both diegetic (given through natural dialogue) and not intrusive. Making the game easy to understand right from the get-go without babying the player is something so many games have trouble with.
CRITICISMS:
The game is WAY TOO HARD, even on "Easy". I spent an hour on Normal and an hour on Easy, and on both difficulties the furthest I got was getting all the gas cans before being mauled at the front door. The camera is too zoomed in on Kaylee that I don't have time to react to a zombie coming from the top or bottom of the screen, and the red-light section only accentuates this problem more. It forces me to waste ammo blindly shooting at enemies off-screen, and the only way to get more ammo by hoping a zombie drops it (which requires ammo to kill it) or by going all the way back outside (which requires more ammo to fight the horde waiting for me there, and since I have to use even more ammo trying to get back in the building, it's pointless). The pickups help considerably, but to the point that they're absolutely essential, despite being completely random.
I understand why these mechanics are in here--it makes the game scary! Survival horror is all about limited vision/control and resource management. But the game isn't scary, and it honestly shouldn't be. It's a game about an e-girl streamer single-handily fighting off a zombie apocalypse with bubblegum; these horror-esque mechanics just make the game frustrating instead of fun, and a game about an e-girl streamer single-handily fighting off a zombie apocalypse with bubblegum SHOULD BE FUN.
Also, the lives system is completely pointless. All it does is restart the entire level and all my progress, something that happens anyway when you run out of lives. It should honestly be replaced with an actual health system.
TL;DR I enjoyed how the game looks, sounds, and feels; but it's too frustrating with its difficulty. I feel you guys need to lean more into the ridiculous/fun aspect rather than trying to force survival horror mechanics into your cartoony retro action twin-stick shooter.
Sorry if my review was long, but I hope you read it all. You guys have a lot of potential!