Awesome smooth gamplay, backed by a chill music. Nice! Also the handling of the cart seems on point.
Things I would add:
- SoundFX (crashing packages, doorbell when the delivery is done, maybe some kind of (electric?) engine sound for the cart to indicate the current speed, etc.)
- ParticleFX (some optical eyecandy like dirt from the wheels acceleration/braking, smashing packges on the ground shattering into pieces, confetti when the delivery is done
Nevertheless: This is a very great and BALANCED entry! Congrats!