Thank you for playing and giving feedback! Sorry it was a bit confusing to you. I did add tooltips on most of the UI controls, but yes, I didn't have time to prepare a full manual, not to mention an interactive tutorial. If a post-jam version ever becomes a thing, I will surely try to make things smoother.
P.S. "afterwords.md" was written in a very sleep-deprived state right before submission. It may or may not be representative of my usual writing.