This is pretty fantastic. A very visually appealing and technically competent piece. Level design was well done and the overall theming is pretty good. A variety of good puzzles all topped with a great level of polish. You should be very proud of this!
But, no game is perfect. It is clearly evident that the game is intended for a younger audience. However your gameplay conflicts with this, for context these are your controls:
WASD - Move
E - Interact
Spacebar - Jump
CTRL - Crouch
F - Punch
Spacebar + F - Ground Pound
What is making me pause for thought is the sort of audience the themes and writing are intended for would struggle with some of these controls and your puzzles which at times can be a little unforgiving. In addition, I think that the theming and narrative of this game could have been improved since you had a very interesting challenge and premise, which is the discussion of emotions to a child who may not fully understand them. For example, Envy was a good example that, with tweaking, could have been an excellent point of reflection for the user in regards to their own behaviour, but at times some of these explorations are either very surface level or entirely absent. Finally, in some of the levels it was possible to get a little stuck which for a child could be very frustrating.
But don't let this deter you. For a project you have realistically only worked on for ~14 weeks, some of which in a nationwide lockdown, this is incredibly impressive. Well done!