I tried to transport my construct 2 game into construct 3 and it doesn't work. It says "Failed to open project. Check it is a valid Construct 2 single-file (.capx) project."
Also is there a way I can attach a file.
Press F12 in Construct window and check error messages in Console log when you are trying to open the project.
You can upload it to Dropbox, Google Drive etc. and post download link here.
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I've fixed it. Also, there's a problem the game goes from running at 60fps in construct 2 to 15 fps in Construct 3. Do you know how to fix it?
I don't, because you didn't post your project file.
You need to run your game in debug mode and check what objects or events are affecting the FPS.
Here's the link: drive.google.com/file/d/1PkWgO3hIqiRHdOyx3ZF7n6oTaGWiPJDB/view
I can't open your file. You need to allow access to everyone.
Try opening this link yourself in Private Mode in your browser.
Here's the new link: drive.google.com/file/d/1cCeegoJrHDSTeHapjlZilNo_ddIQCcUi/view
It runs fine at 60fps on my laptop.
It lags when its in full screen. Here's a video to show you: youtu.be/gY4VpE9K20A
On my laptop it still runs at 60fps when the window is maximized, and in full-screen. Must be something with your PC, try updating video drivers. If you are using C3 desktop build - update NWJS.