Thanks for all the feedback! :) It's great to hear where I went wrong and what I can improve for post-post compo release!
The negative money was originally a bug, but I think I'll keep it since it's a trade-off between going into the red or being able to build more units. It adds a bit of risk reward whether you should buy that expensive money generator or buy some cheaper things first.
I'll try fixing the bug with the tool tips, or just remove them completely. I couldn't find the source of the bug before release, so I just left it in since it was a bit of help at the beginning of the game.
Again, thanks for the feedback! It's much appreciated!