Cozy little game. But OMG please change the music ASAP, after two loops it was really repetitive and I had to turn it off.
I also don't get why the money gained is in X/Min, making this effectively an idler. I think that it should be changed so that instead of giving X/Min, you should give X/Tide. I want to play your game, make me play your game instead of incentivizing just staring at your screen for the number to go up.
The font is a bit jarring when opening up the big menu, doesn't look to good that big and pixelated, but that's something really minor.
Maybe try to give the game some more control over how you distribute the museum? I know it's not the main game loop and I would agree that the digging part is the one that needs the most attention, but maybe the museum part could use some player input to make the scoring more interesting.
I also don't quite get why the upgrades to the rake are not symmetrical. Seems like complicating something that ougth to be simple.