This just blew me away with the level of polishing, graphical quality, lovely map design etc. I did not ger very far yet, as the difficulty is quite high, but it seems to manageable with some more practice. Will play this again later.
The only negative point was the "title text not going away" bug that some others also reported. In case you did not know: fixing bugs like this after the deadline is explicitly allowed by the rules (a bit hard to find since I think there are multiple different rules pages), so you don't have to wait and make a post-jam version for that. As another technical note: the game does not execute right away on MacOS, because the actual binary inside the application package lacks the “exectutable” flag. You can add it from the command line using `chmod +x ./Harveyster\ MacOS.app/Contents/MacOS/Harveyster`. (This seems to be a common problem with that version of Unity? Just had the same problem with another Unity-Game, "Verdant".)
After that, you still have to overcome the MacOS security hurdles, as with nearly every indy game: double click, receive an error message, go to Security settings, enter system password, allow app execution, then try again.