Fluid animation and very charming character. There is a lot of detail in this.
However I did not understand what the main character said at 3 seconds "Oh what's this ???thingy." You should still enunciate your delivery even if fast. The audience needs to understand what you are saying. Especially if this is a comedy since the joke needs to hit.
EDIT: Okay yeah now that you typed it out I can hear them say it but you conjoined the syllables. I used to do the same thing when I tried to talk faster. Your tongue is moving too fast in between syllables that it doesn't fully position itself where it needs to be to enunciate. You also could put more breath into your voice to add some bass.
The pause at 25 seconds should have something like maybe the cashier using his eyes to look at the main character and his "shpenny" for comedic purposes. I notice the main character does change their expression but the cashier should too in order to indicate he is connecting with the MC.