I love Pinguines!
Your game has a fairly simple concept. After playing for a while, I was starting to think of some possible variations ;-) Here what came to my mind while delivering the boxes:
- Randomly spawn stuff with different properties, like a ball that has to be "head bounced" towards the stairs
- Weather changes, making the ground more slippery
- A second "AI" that might help or disturbe the player (when I think of penguins, I always also have to think of pigeons, don't know why - maybe the colors?)