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Then, after that, there is another complete HTML document (with the title \"Ragdoll Physics Game\") including another script.\n\nThis is invalid HTML because we can only have one , , and tag.\n\nThe user probably intended to have one page. The second version is more advanced (with UI, reset button, gradient background, etc.) but we have duplicated code.\n\nSince the error is due to redeclaration, we must fix the duplicate declarations.\n\nSteps:\n1. We need to remove the first HTML block (the simpler ragdoll) and keep the second one because it is more feature-complete.\n 2. However, note that the error is occurring in the second script block because the first script block also declares variables in the global scope with the same names (like `Engine`).\n\nBut wait, the first script block uses `var` and the second one uses `const`. Since `const` and `let` are block-scoped, they would not conflict if the first script is in a different block? \n However, the problem is that both scripts are included in the same global scope. The first script uses `var` which is function-scoped and thus global. The second script tries to use `const` for the same variable names in the global scope, which is not allowed.\n\nLet's see the structure:\n\nFirst: ... ... \n Then: again... another ... \n\nThe browser will parse the first DOCTYPE and first html, then at the next DOCTYPE it might reset? But actually, the browser will try to parse the entire document and might close the first tag when it sees a new one? But that is unpredictable.\n\nAlternatively, the user probably pasted two versions and we should only have one.\n\nSince the second version is more complete, we remove the first one.\n\nHow to fix:\n- Remove the entire first HTML document (from `` to the closing `` that ends the first document).\n - Then, we are left with the second document. But wait, the error may also come from the fact that the first document's script ran and polluted the global scope?\n\nActually, when having two html documents in one file, the browser will only parse the first complete document and ignore everything else? Or it will try to fix the structure? It's invalid.\n\nWe should output only the second document because we cannot have two.\n\nAlternatively, we can assume that the user meant to have the second document and accidentally left the first one.\n\nLet's restructure the entire file to only have the second document.\n\nSince there's an error due to duplicate declarations, we have to remove the first occurrence.\n\nTherefore, we will delete the first document and keep the second one.\n\nAdditionally, note in the second document we have:\n const Engine = Matter.Engine, ... etc.\n\nBut note: the first document already declared `var Engine = ...`. If we remove the first document entirely, then the second one becomes the only one and the variables are declared only once.\n\nLet's make the change:\n\nWe'll remove the first document.\n\nImportant: The current-page block shows the entire file. We must output the updated file.\n\nHowever, note that the current-page block includes two html documents. We only want the second one.\n\nSo we will output:\n\nindex.html: the content of the second document.\n\nBut wait, there's a minor issue: the second document includes a link to Matter.js CDN? Actually both documents do. We only need one.\n\nWe can leave the second document as is because it uses the same CDN.\n\nAlso note: the second document uses a gradient background and the first one a flat color. The second one also has UI.\n\nTherefore, we output the entire second document for index.html.\n\nHowever, to be precise, let's check the current-page: the first document is:\n\n\n\n...\n\nThen immediately followed by:\n\n\n\n...\n\nWe'll remove the first one.\n\nHow to represent the change? We just output the index.html file as the second document.\n\nBut note: the user might have other changes? We are simply removing the first document and leaving the second.\n\nAlternatively, we can note that the error is caused by the duplicate declaration and we are fixing by removing the first occurrence.\n\nLet me write the code block for index.html:\n\nWe replace the entire content of index.html with the second document.\n\nBut note: there might be other assets? We are not changing any assets. Only the HTML.\n\nTherefore:\n\n```index.html\n```\n\nThis removes the first document and leaves the second one.\n\nAlternatively, we could have kept the first document and removed the second one? But the first document is simpler and the second one has the UI and reset button. So the second one is better.\n\nNow, note that we are only outputting the index.html above. There are no other assets to change.\n\nBut wait, the error may still occur? Actually, by removing the first document, we remove its script. The second document's script will run without any duplicate declarations.\n\nTherefore, this should fix the error.\nThe error occurs because there are two separate HTML documents in the same file causing duplicate variable declarations. The fix removes the first simpler ragdoll implementation and preserves the enhanced version with the UI elements. Here are the necessary changes:\n\n```index.html\n```","cursor","eyJpZCI6ImhxMjE2cWt6MWdtYzhuaGI5d2hqIn0","token","included",[178],{"_64":179,"_100":66,"_180":-5,"_181":55,"_182":55,"_183":55,"_184":95,"_185":95,"_186":95},"project_permissions","user_id","can_edit","can_delete","can_edit_members","can_view","can_list","can_participate","routes/browser/layout","actionData","errors"]