Can't say for sure. I haven't touched Windows for quite some time, Plus-X, as BloodScourge suggested, might be your best bet. If that doesn't work, I made a crude script that sets executable permissions for the user and then runs the game. Hopefully that helps some.
#!/bin/bash chmod u+x chrome_crashpad_handler nacl_helper nacl_helper_bootstrap somnaBuster ./somnaBuster
I'll do some research on the subject and get back to you if I find anything helpful.