Thanks for the feedback! For UI zoom I wrote it both in the description and in "the beginnings" section of the info tab. It's ctrl + mouse wheel scroll (ps. it was made that way so you could scroll text without scrolling the whole camera).
Now that I think about it, I think I should have added more information about how the upgrade UI works and not how it generally works.
I also can agree that the upgrade UI could have had some better visuals (it was planned to be a whole cells and not just last/first parts of it) yet the system was very hard for me to understand and make a plan to create such. It was more of an 'idea' and 'throwing stuff in and out until it works'. My main point there was to learn on how to at least make working prototype of that.
Because the UI was made as last thing I had not so much time to work on it (I have poor time management skill and underestimated the difficulty of such a thing).
But despite all that, I'd say the game is final, released. I did about 90% of what was planned for this game and I actually like the final product. I'll take notes based on how this one goes to make next game a little better. Thanks again for your kind review!
(PS. game concept was partially taken, simplified and modified from Spore, the start of it to be exact)