When I have reached the pit under the green platforms Bakkart mentioned, I have had a feeling I was supposed to die by falling, and that I didn't die just because of a bug (I fell sliding along the side walls, and this prevented me to die, trapping me in the pit)
My PC is 13 years old but still good. It has an Intel Core2Quad Q6600, an Nvidia Geforce 8500GT, 8Gb RAM, SSD as primary disk. Not so up to date, of course, but I can run other flash games, as most CG software, quite smoothly. I can't understand why this game is so laggish for me
The game does freeze after the intro, but Flash is fully enabled on my browser. I have no clue about where to look for in order to "enable flash cookies"
 "Vinterget"){kind=icon}
 "OXXO"){kind=icon}
 "ZS Dead Detective - Roving Eyes"){kind=icon}
Try the browser settings, you should find it somewhere!