I guess I'm a UI critiquing mood right now, so here it goes:
1) There's a little bit too much white space around your logo
2) There's not enough contrast on the menu bar between the lime and the white text. If you want to keep the same colors try to make the text in the menu larger (16/18px).
3) "Tranquil Checkers" rivals the logo in terms of importance, i.e. needs to be smaller or make the logo smaller. Basically, my eyes are not sure what's more important, the logo or that text. The icon on the left is also out of proportion with the text on the right. You could move the "Tranquil Checkers" text a bit higher and add a short explanation below (smaller text) so that the height of the changed block of text matches the height of the icon; or just make the icon smaller.
4) The text on the about section makes my eyes hurt. There's not enough contrast. Play around with those colors a bit.
5) "Download free 7-Day Trial" is too large. You could put some kind of icon on the left to draw attention.
6) The two columns of icons looks good.
7) See 5 for the text at the bottom.
Otherwise it's so close... :) I hope this helps, good luck!