This was soooo cute and enjoyable to play through!
If there are future modes that'll be implemented in the future, it would be fun to have a "tetris-like" mode where:
1. Capacity on the train is limited, and...
2. Penguins would come in different sizes, offering different numbers of points!
Since players are incentivized to "perfect" each level by obtaining all 3 stars, they need to find a way to optimally fit the right pengus into the train under time constraints!
This was a great game to play through, and it would be so awesome to see this game continue to be developed!