Cute game, I enjoyed it!
Rarity seems a broken/unintuitive with it adding no value unless polished.
Would be nice if there was an upgrade to make the crabs "smarter" and have carriers/polishers stay closer to the middle when idle instead of wandering off to corners.
End game maxing out crabs was a bit disappointing, never really got the feeling of breaking the game's progression and having 100 crabs or something, which I think is a big appeal of most incrementals. Not too bad a downside for a short game though.