This was so great! I loved the relationship with Hippo. It gave a really strong motivation for why you were traveling to these different time periods, both to fulfill Hippo's wishes and to help others the same way they did with you. The mechanic of foraging for items in the junkyard was cool and I liked how these seemingly insignificant items and moments in the past has such a big impact on the future. I had no idea how you would pull off such an expansive story but you did it! One thing that confused me at first was how you could keep finding trash and repeating the conversation with Hippo about needing to make the time machine, but maybe that's because I did things way out of order. Maybe you could simplify it by not having so many junk items, and focusing on just the main 3. Overall amazing!