I may have had a bug where I simply can't pickup a box. it cycles very quickly between picking up or not the but. So in the end it was very difficult to play. For this reason, I could not get past the "put it all together screen"
Thanks for reporting this! It might be a browser issue? I mostly tested this in Chrome.
Thanks again for the feedback! I think I fixed the bug and you should be able to pick up the box now.