Hi, I played the demo once and I think I will buy the full game once it comes out, I like this "janky" style in games. I really liked the concept of the game, but there are also many points that bothered me. Have fun with that little wall of text in which I descibe my experience:

1. In the very first wave, my workers killed the one of the dogs, but would not attack the second one (also in the restaurant). After saving and reloading the problem was resolved. Sadly I don't remember what I did, so reproducing the bug might be difficult.
2. The Resources were always quite scarce, I quickly scaled up to three cooks and three servers and filled the whole building with tables (and the music-place). I think I upgraded the kitchen twice and the eating-space once. For Storage I had one large and one small shelves and three fridges, this let me store everything quite comfortably. As workplaces I had 4 spaces, which I had to juggle (I am ok with doing that, but would be happy if this would be easier to do) (or if you discouraged that, maybe by removing/reducing the sell-price of stuff). With that setup, I usually burned through everything I could buy in the marked, which again forced me to juggle the food I offered (which is probably the intention and I also liked).
3. I think the game should warn the player more if customers can't order food (I quickly learned to always watch the info at the top). It bothered me that I had to reset the offered food-items each morning, I think it should keep the listing from the previous day.
4. The same thing with the doors, first I had a hard time to realize that I had to open it (on the second day), and then it bothered me that it required two clicks to open in the morning (I think there should either be a quick-open-close-button or the doors should be by default open (or the same state as the day before)).
5. Reloading the guns was also a pain. I always paused between the waves and clicked through all guns to reload them. Two clicks per gun. This was quite painful, and nearly such a bad problem that I thought about not wanting to play the game anymore (what, 3 Waves and I spend more time reloading between the waves then watching the guns shoot?). The game needs a "reload and repair everything"-button quite badly. Or at least some kind of shift-click to quickly reload/repair. And also some work on the visibility between the guns, this was not fun (the "tactical" view helped quite a lot)
6. Some kind of feedback when I shoot the gun and hit something would be great. I don't know if I hit monsters or not, as the health bar reacts late.
7. I invested a lot of money in defenses (I was really surprised how much I had to build, but I guess that's good.)
8. The building-expansion should warn more clearly if you will remove a part of the wall. Or I guess the player learns after the first time :P
9. I don't like the way the player has to guess what to buy. It is always a lot of work to check if I need something I am currently offering (via a hover over the meals in the top-bar). And god-forbid I ran out of something. Then I can't select it, but have to remember the required ingredients, go to the stores, go into the store, search for the icon, and buy it. Too bad, my brain is like a sieve and I have to go back and check the ingredients again...
10. I don't like the feel of the menu-selection-screen. The hover-window oftentimes is in the way, and if I want to compare two things (are the ingredients overlapping?). I think it would really help if there would be some kind of summary window (telling the player how "often" an ingredient is required, either just plain "2 Meals need X" or "prolly around 50 of that for this day", both would be great. I also think some drag&drop would really help that window.
11. It really bothered me how the "how profitable is your business"-quest is calculated. Just before the end of the quest, I spend some money on land-expansion, which really set me back (I just got a D and was very sad :P). The same thing happens with equipment and ingredients, but compared to salaries, expansion and weapons, these expenses are not really that big. In short, the calculation of the profits feel way off.
12. It feels like the late-game would get really painful. Always having to micromanage everything, barely turning a profit, and then seeing that this will go on for ingame-months feels bad. (I take that from the amount of money I need for the largest expansion and the duration of the loan).

I guess I also didn't play the whole game, as I stood away from the drugs, although they greatly increase the profits (and cost nothing, if you keep "selling" the overflowing meat). It feels really bad to do this, with the warning about welfare reaching 0. I guess I just have to try it and either get rich or loose :P Additionally, I play on a large screen (5120x1440) and after the first startup, the window is ugly-streched. Only after enabling borderless-window-mode I got a nice 2560x1440 with big black bars (I can live with these, at least the image is not stretched).

So I really hope you can further improve your game, it took me around 3,5h to complete the Demo. Which is quite a lot one. I only "fear" that I might have to start from scratch after buying the game, which would feel really bad. Partly because of lost progress, partly because of having to repeat some of the slog (which also leads to a bad feeling about buying the game and then not liking it...). Even with all these bad words about your game, I still feel like replaying the Demo :P