This has got to be the most content-filled entry be a long shot. I mostly have minor nitckpicks, but please know that I really did like the game overall, even if it's way too long for me to ever finish.
Sudoku: The hint patterns or whatever they're called are genuinely cool and can be helpful, but I also found them to be distracting. Being able to toggle them on or off with like Select or something would be nice.
Takuzu: I had never heard of this game before. It's pretty neat. My suggestion here would be to either assign one color to A, and the other color to B, or to keep A as-is, and make B do the same thing, but with the reverse color order.
Mines(weeper): I wish it had that feature where you can click on a number and expose every other square around it if it already has the correct number of flags around it. And similar to sudoku, I found the helpful hint square thing to be distracting.
Tents: Another game that I had never heard of. I love Picross, and this reminded me a bit of that. And the graphics are adorable too. I expect that this will be the main thing that draws me back to this collection.
But yeah, overall a strong jam entry. I've gotta give a fellow GBDK brother some love, even if it's tough love lol.