I think this is a very successful game! I don't recommend using a trackpad, haha. I think the core throwing mechanic is delightful, and the levels were adequately challenging (level 6 defeated me with the mid-air catch/throw).
I did find that the rewind function isn't very useful, and sometimes breaks (couriers not respawning where they should, or not respawning at all). I also think that failing a level would feel more impactful if there were stronger audiovisual cues, like music, or the package appearing broken, but these are fine details.
Very much enjoyed my playthroughs, would love to see where this goes!