I'm not gonna lie, I tried this game purely for the penguin, I love it! Its animations are just top-notch.
I had a ton of fun with this demo, the gameplay is amazing, the penguin is adorable and those levels were so good ! It's a really simple concept, and yet I never felt bored while playing it and got through it all in one go. It's fast, responsive, intuitive and deep enough to feel your progress in its mechanics.
The music in itself is good too, but maybe it's a bit too chill for its levels ? (it's perfect for the HUB) I had the most fun when I tried to advance as fast as possible but the music didn't feel quite as driving as it should, maybe that's the point ? I dunno.
Anyway, so far this is my favourite game of this Expo.
As for finding the missing bottlecaps: I did plan on separating out the bottlecap list for each subsection of the level, but unfortunately I didn't have time to implement that for SAGE. But it'll definitely be in the full game!