Truly a beautiful game. Its artstyle looks like it was taken from a children's book. I hope you can develop it into a full-fledge game.
However, for the life of me, I just can't get all the medals. I suspect that one of them I get it after I climb all the pipes, but there's a point in which the kitten just doesn't jump anymore, he gets stuck to the pipe. I don't know if it's a glitch or I'm missing something. That must be the XXL MEOWING.
"Little Pig" must be related to getting clothes dirty, but I just can't figure out how. "Primary instinct" you probably get it by hunting the bird, but I can't do it (any tips?). "Shortcut Master" I don't know, perhaps it's related to the pipe system. "Revenge of Dog" I got it on my first playthrough, but once I reseted the game (that's another problem: some of the medals don't seem to work even if you get them in the game) I couldn't get it again (in the game, I already have it on NG).
So that's pretty much it. I wish you the best with this and hope to see a full game in the future. Ah, and I don't agree with the people that tell you that you should provide more props and explanations as regards what you have to find, do, etc. in order to advance in the story. I think it's perfectly fine as it is. Kudos!