Something weird
I thought it was slightly irritating that the area of the cheese is so small, and you can't see it.
OK, I was going to write more, explore storyline and glitches. However after spending 15 minutes randomly moving my mouse around to find the 5th piece of cheese I gave up. I guarantee that for every person that says something about being stuck here there are plenty that just give up and give it a low score.
The fact that I can't find it disappoints me, as it is apparently the 5th in a series of games, which leads me to believe that the story line must be fairly good, and so must the game play. Although, I also see that you have only submitted #3 and #5, I am guessing the others were blammed.
Regardless, if you made the cheese easier to find, with a bigger clickable area or made it visible, I would be able to review the game instead of the wildly flailing my mouse around for 15 minutes.