One of my favorite submissions I've come across.
-Lots of charm and humor, I went through this with a big smile on my face.
-Gameplay is the fun kind of frustrating, which is well justified by the game's theme.
-Lots of different ideas have been mined out of the central premise (each level feels distinct)
-The little jingles at the start and end of each level are a lovely little touch.
A few very minor nitpicks.
- The third level is harder than the level on either side of it. May need re-arranging.
-The font is kind of hard to read, and for the in-between level text that can be an issue.
- There is no incentive to play well once your tip hits zero. Perhaps introducing a failure state if you go too deep in the red, or having to pay for late / damaged arrival could continue to keep the player honest.