Thank you very much for taking the time to play our game extensively. We are very happy you like it that much.
You could split audio rating into sound effects and music if you like, and maybe give one or two stars for sounds, but no problem if you give 1 star for the audio category.
Considering your nitpicks, I am totally with you, some mechanics definitely should be explained, maybe with a small tutorial, but we did not have enough time for that. Also some icons popping up over your dragon could help understanding the state of it better. Thats totally valid critics, Noted for post jamming.:)
The clarify, careful spoiler alert:
Each food has different weight or mass, but you always have to reach the same total mass to evolve your dragon. At the top of the screen is a very small progressbar indicating your total progress, in case you didn't see it. So the number of eatables to feed to reach the end can vary, assuming you only feed one kind of food. No timing or timers are involved to reach the end.