what do I do now?
hello, what browser are you using? Chrome or firefox work best, try refreshing and press start playing, if that doesn’t work/get you to tutorials then I suggest pressing F12 taking a screenshot of the errors in console and emailing firstname.lastname@example.org with it, they should be able to help you out.
Indeed, after changing browser to chrome the cubes were loaded much faster and i enjoy tracing! Also i don´t wanna miss the brighter cursor on 2D, before (used FF) often asked me where i am on this side of the page? Before: so many minutes loading time without tracing - never regretted to change!