Thanks for your feedback - it looks like a couple of steps were sharing that hint prompt, I've reworked the hints so now every step along the way should have a unique prompt. I plan to change the hint system so each step has multiple hints available to cycle through.
As for having multiple levels available, I think this is a great idea, my plan going forward is to have multiple disks with different sets of levels. I had planned on these disks unlocking linearly, but I think having at least 2 disks available at all times that players can jump between would be a nice way to avoid any frustration.