This game is simple and sweet! I especially enjoyed the different aesthetics for each level, both visually and musically. I love that you incorporated that level of detail for a game jam. Plus the characters are all so cute and the use of "friends" for the main mechanic just makes the whole concept adorable
Right now, I think the levels are a bit too easy, but this would be seriously interesting to play if you expanded the levels, adding more challenging sections and giving the player an incentive to explore the whole level. I also think the jump movement could use a bit of polish, although it definitely doesn't ruin gameplay by any stretch.