It's funny you mention that! As it so happens, we have the "Creative Update" in the works. There's also another major update, "Custom Circuits and Saving", that is in the final validation stage. It has been on the verge of release, but life has delayed it a bit. Anyway, thanks for checking it out!
LoneZGames
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There are a couple of things that immediately come to mind as to why it may not be working. When not in fullscreen, the default behavior for CMB on this (and other) webpages changes mouse function to scroll, which interferes with the placement. Additionally, this game uses default mouse settings, so if you have a more advanced mouse or have adjusted the mapping that may be the cause and it may use one of the other buttons instead.
To clarify, for placing components you would just left click the image of the component, then use CMB on the grid to place it. It will not drag an image when selected. Lastly, the tutorial is non-interactable for selecting and placing components (if you attempted to).
If, after all this, it still doesn't work for you, I'd appreciate you letting me know so I can look further into it. Thank you!