Hey, this was surprisingly really good! I didn't expect much from this considering the only other Game Boy platformers that I remember playing were Super Mario Land (which I heavily disliked) and Kirby's Dream Land (which was fine but way too short), so getting a pretty good length game was actually pretty surprising and welcome! I also think the gimmick of this game being the companions works well to not change too much from the formula but also make for a lot of unique combinations, sort of like Planet Robobot with the mechs. Coo is definitely my favouirte of the three mainly because I love the Cutter and Parasol especially, but the other two have great one such as Rick with Stone and Kine with Ice. I didn't get to use all of the combinations, but I spent a majority of the game with combinations I really liked, so I was alright with that personally. Levels were pretty fun and there never really was a point where I got frustrated, I thought the difficulty was pretty fair overall and had pretty good progression despite the whole game being pretty easy overall. I guess I'd say the only part I actively didn't like was the part in Dark Castle with the sidescrollers and you had to guess which side to go on otherwise you're hit with a dead end. I never really liked that trope in level design, but at the very least it's not looping and guessing which exit is correct, those drive me mad. Overall, I'd say this game was a lot better than I expected and made for a great casual experience for the couple hours I played it for.