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Cool demo! One thing you could do to improve this is use quaternions to handle rotation of the cube. There are some great articles on implementing quaternions out there if you search for them. For example, I noticed when you turn a cube "upside down", the dragging to the left or right (with ctrl pressed) rotates the cube the wrong way. Quaternions are a great way to solve this issue

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Improved it, thank you!

Note that Quaternions didn't fix the issue by themselves. I had to change the interpretation of cursor movements to use axis-angle rotation based orientation.

The fix could be deployed with or without Quaternions.

yes, Quaternions.. thank you! Will do.. :) I was expecting exactly this answer to the third problem I mentioned in that medium article. I've been thinking of studying them for some time now.

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