This was fun! Though, it felt maybe a little too easy on normal mode - the big rock stopped being a threat a couple minutes in, and after that I spent the rest of the game in the menu maximizing speed/smoothness/mass. I only used the slot machine a few times near the start, and got some stats out of it, though it seemed to become less useful as my pebble output increased. The result of all that is that the game dragged a little toward the end, since I was no longer under any threat of losing and was just trying to optimize for time. Overall, though, I had a good time with this! And I have to admit, it was pretty funny how the rock just filled the entire screen after a certain point.