Love the hand-drawn style, the penguins are very cute! The typing mechanic is fun, reminds me of some typing mini-games I used to play.
One thing is that if the whistle goes off and I get the bar down to blue while the penguins are running over, they still die :(. Also would have been nice to have some of the UI elements in the same style, but I understand its a very short window to draw everything.
Overall, great work!