Really great idea. I love mouse copy games so this is right up my ally.
Fun 4/5
Really really suffers from no explanation. I didn't even know this was a mouse copy-esque game until like 5 minute in. I kept switching my sands of time around but nothing was happening because I didn't do it in the right order until I figured it out. Some explanation would make this 5/5 imo.
Balance 4/5
Not sure if this falls under balance but it got really hard to create multiple loops due to some loops starting a new red sand while trying to make another new loop. But other then that the game got a lot faster. I eventually maxed out my sands.
Uniqueness 5/5
Very creative! Not much to say here. :)
Theme 5/5
You utilized "time" very well.