Fun game and I appreciate the extra effort with the main menu, managing sound and teh extra mode. Crazy mode definitely the funnest way to play imo.
One thing I would wish for is the ability to show just a teensy bit more of the grid, as it is I felt like the chance to slam into bullets from offscreen whenever you moved was just a little too high.
Minor bug report, honestly doesn't affect my rating: I was able to just walk off the screen to the bottom right and the squares didn't seem to know what to do while I just sprayed the screen. Side-benefit though it let me rack up around 35k points, lol.