I really appreciate how your tutorial was actually a playable sequence. I really enjoy these minimalistic plaftormers and you did a really good one. Elements like using color to separate packs and delivery points was really clever too, so congrats!
My only downside was the lack of sound... even simple sfx like from bfxr.net would really help the flow of the game, like playing a sound whenever the smaller platforms are about to collapse and so on. Even so, it was a really nice game.