I was talking about that it silently drops my uploads.

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There are now version 88.1 in extras-devel. It uses same resolution (640x480) than original, so they use same 'savefiles'. It is not very fast, small scenes are about 14 fps, more complicated anything between 10...0,01 fps. Previous version was faster, but menus was messed (because of too small resolution). This is playable and feature rich, but maybe too slow to be really fun, decide yourself.