The 1.03 patch is incoming with the following notes...
NEW - replay game ending (available if you haven't started a new game)
NEW - windowed mode
and
Increased *wait* time for multithread loading (fix for slower machines)
Repost achievements on launch (fix for any missing achievements)
Added app_id file to root directory (for linux testing)
Added / removed keywords and phrases for balancing
Added GUI options for hardware flags and acceleration
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Note for players running a BETA branch or using launch params:
You will need to reset these options after updating, available in the init.json file (browse local files option from Steam properties) or from the options screen in the GUI.
E.g.
{"hardwareAcceleration":true,"inProcessGPU":false,"windowStyle":"full"}
For no hardware acceleration:
"hardwareAcceleration":false
For the inProcessGPU launch parameter flags:
Remove the --params from your Steam game properties tab.
"inProcessGPU":true
If you have not been running a branch or using params - touch nothing :-o