I've done two of the endings so far, so I'll answer the questions!

1. Yes, I did. 

2. Me, obviously ;))

3. I feel like the story should be longer. With the two endings I've gotten so far, I did feel dissatisfied and wanting more. I loved Alto and I wish there was more. To be honest, I thought there was going to be more, but it ended. Nonetheless, still glad I read it!

4. The end :C