Please note, that its very-very alpha.
It works for me, but you can have problems with different images.
Run it from command line like:
Croquet.exe >myLog.log
this could give you a chance to investigate a problem. Also, if it
crashes, you can find a crash dump at same location where you put
executable.

Have fun exploring bugs :)

-- 
Best regards,
Igor Stasenko AKA sig.