I still think that 4 days is too short a timespan. Specially when you consider the amount of time some games can take to complete and the fact that some entries need a bit longer consideration to realise the underlying message.
Also, Some people may only be able to put any thought into it for one or two days of the week and a timeframe of 7 days would ensure everyone could have whatever day of the week they choose to have a last ponder.
I still think we should be able to ponder over the list for a week, maybe with the list of entries being shown for a full day before voting is possible. (To encourage folk to check out some of the stuff they missed.)
Furthermore, I think that as it is, games may well be disadvantaged if they are released on the last day of the month.
I'd suggest: 1st - list of nominees is available; 2nd - voting is possible; 8th - voting is closed.