I fell in love at the first screenshot! The UI is exactly my cup of tea! I love ascii art, especially charts/graphs, etc. Did you use an existing framework/library or is the UI all original? I also really like the sfx, it sort of reminds me of the circle of fifths (I'm not a music person, I've just heard OF it) which is super cool!
Only thing I would ask for is more explanation of what the upgrades do and what the charts mean. Does SPS stand for "Score Per Second"? Also, I haven't gotten far enough to see any kind of "prestige" system yet, is there one?
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I used the default UI system in Unity and tried to keep the fonts all monospaced.
I hope to get some updates out before the end of the jam to improve some of the things you mentioned. Like the clarity of the upgrades, also some additional upgrades and eventually a "prestige" system.
SPS is indeed "Score Per Second", but I might change the "currency" still.