Outstanding game! I keep suggesting people to use things like camera shake, hitstop, crunchy sfx and crunchy particles to juice up their game. Finally, I find a game that meets that expectation!
Its a very minor thing - but it might have been cool to see even more variation in the magnitude and duration of camera shakes, although there already was a decent amount.
I can understand why you did not implement hitstop in your game - just too much going on to want to pause the game, but I think if you used it sparingly, mainly in key moments of the fights, then it would add some extra pizzazz.
It was difficult at first for me to understand where the mental engagement for the game was. I thought, okay this is just an auto / looping type of game, that's all. But I began to realize that how much you spent and whether or not a weapon was enabled or disbled mattered to some extent.
However, I also saw that I often didn't pay the full bill, and so my rates went up (love that) but I still survived until day 14, even after many consecutive days of my missing part of the my payments. I'm guessing there are some calculations behind the scenes to determine at what point the player is really severely punished for missing too many payments, but I wish those were made more obvious to the player, so it could inform my decision making.
Similarly, I didn't understand how much life I had left, and so it was impossible for me to gauge how careful and careless I should be about protecting my plant. It was not obvious to me when I was taking damage or how much damage I took. So in that sense, though the game does aspire to be a thinking mans game (or it seems that way) I think the UI and communication of player state is lacking, and makes the game feel a bit more braindead then it actually may be or was intended to be.
I still had a lot of fun, because the point of the game was to turn me into a killing machine, and you executed that very well. I also really enjoyed the resource management aspect of it, up to the point I realized that I didn't feel noticeably punished for missing payments and didn't know when I was near death.
I would be happy to playtest an updated build if you keep improving this, because I think this genuinely has a ton of potential as a browser, mobile or even steam PC game. Sorry for the long message.
I would also really appreciate it if you can give me some feedback on my submission as well.