Look: 9/10
Even the look is very abstract and absurd. Little objects with lots of trails, culminating into a visualization of sound, well actually player control of both at the same time I suppose. It seemse like everything has trails, even in the menu at the beginning of the game lol. By far the most interesting C64 game I've come upon so far, it has not been my favorite genre thusfar.
It's hard to get good screenshots of what the game can do, cuz like with music creation, the best moments just happen and never when they can be re-happened. 

Sound: 10/10
Wow this is by far the best of the super early art games / non-games . I love how the sounds just never stop and never stop changing. Even during the menus.
Play: 8/10
Wait what... It's an awesome feeling when you slowly realize there really is gameplay to this. Start with Beginner mode if you are actually interested in exploring what the game has to offer. Tho each mode got "old" real quick, I know I will be returning to this cuz it's interesting and infinitely different everytime.
Feel: 9/10
"Mickey Mouse Presents" :-p This is so abstract. And so well-executed. You just have to play it. It's accessible on The Internet Archive.
Attachment: 8/10
I definitely know I will return to this to show my brothers and my buddy, but how often I will actively play it is debatable--since... after all... it's not really a game per se heh. But whenever I feel like creating instant music, this honestly does a darn good job of it. And I'm all about algorithmic experimental music / aleatory etc etc.
Playtime: ~15 mins