Well, it's three and a half. I think, it's quite fair.
Overall, game sometimes became really boring. That was because of serious flaw in your item appearance mechanism. I guess, you just randomized it, decreasing the chance of appearing the further you go without actually checking if generated items are enough to complete mission. For someone it's not a big problem to make it with 2 or even 3 days, but for some people called "completionists" (also me being one of them) it is a real pain in the arse. Level 13 is symbolical, I was really mad because even that I perfected this level, there was still not enough items to complete level. I restarted it about 7-8 times and was never able to complete it in one run, so I REALLY wanted to be a jerk and put 0 to the game and close it. So, after all, I had to end it up with 16 days and not 15 >:(
Also, dog. I see that if you're not catching objects or choking your speed decreases and dog is catching you. I guess, choking is okay, but item collection is a big failure though, as I mentioned above, item generation mechanism is crap (sorry, but true, I can code the same mechanism in 1-2 minutes, it's really bad and spoils the fun a lot, and the first gamedev rule - NEVER spoil the fun =), so sometimes dog just catches you even if you're never choked on the level.
And, as I said - gameplay has something in it, but it becomes boring quite soon, I guess, a few fresh ideas to diverse the process would've made it much more fun.
That's what concerns flaws. Also, the thing that made me to complete - characters. They are really cute and funny, I liked them a lot. ALSO, during level 13 I was thinking of them like of total jerks doing some useless crap and I hated them, but, after all - they are awesome and the story is fun, I love happy-ends =)
So, next time put a little more time into testing your own game and making it more playable, more fun and less frustrating (or, if you WANT to make it frustrating, put a tag meaning it, I hate such games and never play them). Good luck =)