Hi yamyam, thanks for your comment!

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Hmm, I also have a 2Ghz CoreDuo, but since the game uses only a few of graphic resources i think it's not a matter of CPU or Graphic card. When you say too fast,
you refer to the normal speed of pigs? There are also two items you can use, one of them speeds up pigs and the other one speeds them down.

I also think it's a good idea to change the game so that pigs will speed up as score or time goes by, but doing so I would have to remove those items. Instead, maybe reducing the normal speed of pigs will be enough?

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You actually don't have to click on the bell, but on the pig who holds it.
Maybe it's too difficult to see? If so, i could make it a bit bigger

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Yes, you are right. Actually this is because the installer includes Python and Panda3D which are quite big. (this instaler is automatically generated by Panda3D)
One solution for this problem would be to use "py2exe" instead of Panda3d to generate the installer, because "py2exe" includes only the really needed DLLs and Python files. (So maybe i would get a 10MB~20MB total size instead of 100MB)
But they say it's quite difficult to make it work with panda3d.
I'll give it a try ^^

Thanks again for your comments! I really appreciate them.

コメントは日本語でも大丈夫ですよ。　＾＾