Look: 9/10
Every screen is absolutely gorgeous, from the colors to the flashing crystals to the varied facial expressions and happy kid-friendly vibe. Cutesy, cozy, comfortable, friendly, smiley. Great classic Apple II colors and graphics. Maybe I'm just a sucker for Apple II looks, or it's just been a while since I played an Apple II graphic text adventure, but I was loving so many of these screens. A lot of the adventure games I'm eager to play, namely the Humongous Entertainment games, have a similar look and feel. For example, I liked this perspective from the doghouse, as well as the look and colors of Mickey's house in the distance and the classic green of the yard 
The animation of the crystals (they flash/move) are so perfect, too.
Sound: 7/10
Some good jingles and sounds, especially for an early graphic text adventure.
Play: 8/10
The text adventure itself is written quite well, and not too kid-ish: after all it's written by Roberta Williams herself. However, like with many of these kid-focused text adventures, you have to select your command. It winds up adding a tedious, slow nature to the game. Fortunately, with modern technology, we can speed up the computer ;) Which, when I did that, made the game playable (plus, the lovely screens and cutesy/cozy feel/descriptions/look). I love that in the game, you see the items you can collect and when you Get them they are visibly gotten, so to speak. Helps a lot with the gameplay, and I don't consider that making a game "easier" but rather more enjoyable and logical. I also love the item usage, like you get the crowbar back on earth but use it to remove the crystal from the statue on Oberon--classic adventure item retrieval/item usage that I love, from Zeldas to Pajama Sams to, well, almost every adventure-esque game I like ha.
Pro-tip: Don't get too confused and lost, make sure to first explore Earth before venturing too much. Defffinitely make sure you go to Mickey's house, namely the garage and bedroom... and bathroom... etc!.
Another pro-tip: some of the education about the planets has, in the 30 years since this was released, changed heh... e.g., the hint for when you need to go to Pluto :-p
Feel: 9/10
The beginning gave me such Putt Putt feels, especially considering the fact I knew there was a spaceship nearby a la Putt Putt Goes To The Moon feels. 
Wow, even Mickey's car (which you sadly can't drive) looks like Putt Putt!! 
At first I was frustrated that I couldn't figure out how to save the game, so I could actually finish it with the snail's pace it goes in. But once I discovered how you save (you go to the central room of the spaceship, and SAVE GAME becomes a command), I realized I love that! Gave me Crash Bandicoot Warped feels, where you saved at the center of the world portal screen. And wait... is this in the Kingdom Hearts multiverse? lol. Mickey Mouse having to write a letter to Minnie explaining that he will be gone on a long trip? On a spaceship no less? If only it were a gummi ship... Also, lol cute touch with what you find on Pluto ;)
Attachment: 8/10
Wow, what a dream 
I guess I'm still a kid at heart, and should just start focusing on kid-friendly games heh. Or that's just the difficulty level I can handle :-p As tedious and slow as this would have been on original hardware, particularly with the disc changes like a lot of these longer more elaborate Apple II graphic text adventures (why is it always the ones with a "home base" between multiple settings, like a time travel machine or the spaceship in this one), this proves quite enjoyable and worth a try (especially for a click your commands, instead of type your commands, type text adventure that I usually dislike). Plus, those Humongous Entertainment feels, from the colors and images to the item usage and simple puzzles (tho using the mattress to cross the lake on TItan would not have been easy to me heh, were exactly what I needed.
Yesss, when you give the sunglasses for the crystal on mercury lol 
Annnnd at last, got all the crystals and gonna head home for my celebration 
Yay! And cool that there are "multiple endings" (allegedly). I wonder how I can get "welcomed by a friend" when I return? Maybe I messed up the letter to Minnie? Or it was something extra on one of the planets? Either way that's a super cool touch. Ohhh, Roberta Williams. This is, indeed, like the Kingdom Hearts of 1984: the Queen of Graphic Text Adventures (Roberta Williams), like Square Enix of early 2000s RPGs, using the Disney setting. Heh. 
Completion: Main Story
Playtime: ~2.5 hours over 2 play sessions
