Hey, thank you for playing and for the feedback!
Adding a little tutorial is on my todo list, I'll definitely show where is the pen :) And sprint needs some rethinking, might just remove it and make the character faster overall. The feeding sound was actually an explosion from sfxr :D I will replace it along with watering sound, for sure. The story was little cute background to give you a reason to collect these deer.
Thanks again, I'm happy you played my game! :)