This game was really enjoyable. The story was, for the most part, excellent; I liked the decision to make the characters animals, as it made their often outrageous (while typical of adventure games) actions more believable. The gameplay was solid, if not especially compelling. I was surprised at how much I liked the graphics as well; even though they're a little crude, they go with the game really well and I think they really added to the experience overall.
First, the negative:
aka, nitpick time! =D
-Most of the bosses (the crab and the one in the dark woods in particular, as well as you-know-who) were frustrating due to the lack of feedback. You had to just keep whacking at them and whacking at them until the went down, with no indication of whether you were getting close to killing it or not. The Dark Woods boss was especially susceptible to this, since hurting it isn't so straightforward as whacking it. Just a vague indicator as to how much progress you're making would be really nice for the long-ish bosses.
-I also had a bit of a problem with the music. First, the tracks were too recognizable. When I was immersed in this creative mouse-world, hearing the Hyrule Field theme threw me out of the experience and into the street, whereupon a car drove by and splashed mud on my clothes. Second, it doesn't fit with the excellent visuals and story you have, which work towards a very story-book fairy-tale theme. The tone of the Zelda games is fairly different from the tone of these game, so it worked against the experience quite a bit.
-Why was weapon-switching mapped to 'S'? It was a pain to reach, and a hindrance in the Dark Forest boss where the idea was to switch between weapons as fast as possible.
-The combat wasn't fun in itself. It wasn't unfun, perse; the combat just did nothing for me good or bad.
-Did you really have to whack all the trees to get that scarf? I started out trying to get it, even though the game's easy enough that there's really no need for it, but I was holding my shovel in the dark forest and figured it wasn't worth the trouble to go back through after I'd returned the rocket ship part to the doctor.
Now, going into spoiler territory...
That's basically everything that bugged me about the game. Now, the positive! =D
-I really do love the setting, the use of anthropomorphic characters, and the wry humor. The story overall was well above average for a game, and definitely the main attraction.
-The collision checking was surprisingly excellent. Most Game Maker games I've played of this genre have terribly inaccurate hitboxes, often making combat feel cheap or giving an invisible shield around objects, but that was nowhere to be found in this game. Good job on that!
-The graphics are great, despite being almost "ms-paint"-y, and really go perfectly with the game.
-The humor was funny, without being overbearing. Its contrast with a lot of the more child-friendly elements of the game made it all the more hilarious.
-Along that same line, I like how the whole story was sort of a more sardonic take on a fairly familiar story ("mouse leaves family to go on an adventure and gain wealth--or cheese")
Overall, I think this was a great game, well-worth the time spent playing it. It succeeded on most fronts, and I'm looking forward to the sequel.