Penpal Kitchen is an incredible game, and I loved watching playthrough after playthrough of it. I would absolutely love to try it, definitely one day when I have access to a VR headset!
Just from watching gameplay, it is clear that this game is very thoroughly thought out and well-made. I absolutely loved the intro environment, it was a very cool way of displaying and interacting with 2D comics, as well as setting a story. You both have incredible 2D and 3D artistic ability, and seeing them in unison really makes a visually stunning game.
I think the strongest aspect of Penpal Kitchen is the overall tactility of the game. Although I was not playing it myself, I noticed all the little details present-- ability to flip the notebook paper, a sound on every interaction, and especially the funny effects when you drop your ingredients. This was indicative of the fact that you guys spent a lot of time on every detail of this game. For a VR game, this is everything! Even as someone who wasn't playing, it felt immersive.
Overall, awesome game, and congratulations to you both on winning a contest with this game!! Much deserved!