I like this one a lot, personally. A very pleasant little experience. I think there's a lot of potential to make this into a unique management sim with those splashes of Overcooked. It's not often you see a game where movement is 1-dimensional, and the way it's done makes for a very interesting dynamic. The UI is also immediately clear, it took almost no time at all to understand what was going on.
It says in your page that you're planning to leave the multiple tools bug in since it makes for an interesting dynamic. I think that's a good headspace, but it does feel like a very strong exploit that you can just grab every tool at the start of the day and no longer need to think about them. I'd leave it, but try to think of a way to balance it so that it's not strictly the best option in every situation.
The fastest move speed was too much for me, personally. I might've preferred a dash button or something.
There's probably a lot of ways to evolve this experience from here. Like tools that can fill multiple meters at a time, tools that require you to be right next to the passenger instead of on the same floor, tools that take longer to fill, tools that fill meters when left on the floor, something like trash that gets dropped occasionally and needs to be disposed of, that sort of thing. If you plan to continue this, my next step would be to see how you can diversify the way the different tools work, and maybe even diversify passenger types. Plate-Up definitely makes for a good reference. I'll be looking out for updates!