Cool aesthetic, and pretty polished game. I liked that it was a basic mechanic but it was satisfying and the upgrades felt meaningful (some maybe a little too meaningful, but appreciate balance is hard for 7 days).
One thing that felt missing (because of how polished everything else was) was a bit more feedback when selecting a washer, there is a slight delay when choosing one before it starts up and it would've been nice to have more instant visual feedback when hovering and choosing - like your UI which felt very responsive and had nice feedback.
Only other problem I had was money falling to far left/right, which made me sad because I like money.
Very good entry, super polished for a jam.