I played it!
The art is really great. I wish it had some polish...
It's a bold choice to make a game purposefully without instructions xD, I get what kind of atmosphere you want to pass in your game. But be careful xD
I solved + -, the color of the meal represented which of the bars that needed to be fed, this meal had a colored color in the specs, and every other one would decrease the other bars related. And those icons, resembles of some body parts. The red one for intestines, the green one a tie (?) and something like that xD