Well, I have been playing GDT for about a week now, and I am absolutely hooked. I have been playing for about 5 hours a day and managed to flip the game twice. However, there are (very) small quirks in the game that I would love to see fixed.
Menu speed
The drop down menus are too slow. It takes a couple of seconds for them to appear and retract, which is very annoying, especially because I am playing with a track pad. I suggest you make the speed of the menu animation configurable in the settings. Or, if you are feeling lazy, just allow us to disable the animation.
Employee hitbox
Too small. As of now, you have to click on the person to access their menu, but the hitbox is so small, that I often end up missing. I suggest you make it so that we can click the table (or part of it) they are working on.
Default Names
Hate em. No, not saying you should make them look awesome. I am saying you should get rid of them in general. You should force the user to enter the name. I often get so carried away with the features that I forget about the name, so had a game called “Game #43”, 4 engines with those default names and guess what my first console was called? “Console Name”.
Console Design
Kind of blan as of yet. I think instead of providing us with ready designs, you should provide us with parts. You the character design in Sims? Why not do the same for the consoles (in 2D of course)? This way, we will have more freedom and will not end up with repetitive designs.
I love the game though and am waiting for updates 
By the way, where can I donate to Greenheart Games?