Thank you for the feedback!
I also saw some people struggling on that level. I tried to get a last second voice line in to hint at what you should do, but I don't think I did, so I'll be changing some of the voice lines and hints to give you more of a hint if you get stuck.
And yes, for that level, you can complete it with 2 cubes. It's a bit of a difficult level, but again I'll try and make some new voice lines so people hopefully won't get stuck.