Your points are very spot-on. I've enjoyed working on this project a lot, despite the seriously limited time I had at hand. Therefore, I genuinely intend to work on it more, so your review is invaluable!
Oh, I had so many ideas for this game... There would be an additional white-dressed customer who would change lanes just to spice things up, and the cabaret would be played to pause customers' orders, similar to the original game, etc. 😄
I added the life system in the upper-left corner, but after the failed implementation of the leveling and spawning system, that feature ended up being just a UI element...
Hmmm, for the drink filling part, I tried to stay true to the original; the version I have resets the filling at the slightest movement. I will also test it without resetting as you suggested.
Thank you so, so, soooo much for spending time attempting to play this humble version and providing such a detailed review! I truly appreciate it.