This was a pretty neat thing to kill time with, I'll quickly go over them individually.

First GameBoy: I can definitely tell this is a very old quest, a lot of things just look bland and quite frankly rather terrible. The grinding segment for the bombs didn't feel fun in the slightest and the only notable thing really is the only dungeon which was just ok at best. Quest just abruptly ends after you go into the future so there's really nothing more to it lol. At the very least there weren't any bugs from what I've seen. 1/5

Puzzles of Hyrule: Actually a pretty solid collection of dungeons here, tbh I think there just isn't even any need of having an overworld segment since it's literally just 2 screens. At this point, just go directly from one dungeon to the next and dw about anything else. The dungeons were quite enjoyable though, massive fan of Level 3 which I'm sure you've done this concept before but this was really nicely done and wasn't too big to the point where things drag on. This can be said for the other two dungeons too. Ending was extremely underwhelming though, I thought there was gonna be a bit more but again it just abruptly ends. Other than that though, pretty neat. 3/5

Mysteries of the Cup: This was much smaller than I anticipated, I didn't think it'd be one single dungeon but it was pretty cool and fairly standard for a dungeon. This one absolutely looks the best though, like the general screen design is actually really cool compared to everything else you've made in the past. The puzzles were cool and again nothing really dragged or felt too over complicated. This one had at least some boss at the end, but even then I didn't expect it to be over so fast lol. 3.5/5

Overall though, First GameBoy was just bad but the other two were quite solid. That puts the whole collection to a 3/5 overall but it's neat seeing different ideas come together in one collection like this, even if they feel very incomplete.