Nice game idea! I like that it doesn't really punish you too much for going wrong, you just lose out on potential points. That removes what would otherwise be quite frustrating.
I thought being able to see the black cubes would give away the answer, but there's not enough time to take in that information and make a decision before the floor gives way, so it's kinda okay. You could fix this though by disabling the mesh renderer of the object (or the entire object) until you've stepped on it.
Also a small technical annoyance, the high score counts up at the same rate no matter how high it is I think? I got 2,200 points and it took FOREVER for it to finish counting. It would be better to set a timespan (like 1 second) and just Mathf.Lerp from 0 to your score so that the player doesn't have to wait around for that number to count up.
Oh yeah, and I know it's not judged, but the presentation was fantastic in this game! Really pleasant to look at and just generally play.
- Joe
(if you have the time to rate our game we'd really appreciate it too! ^_^ )