I'm fairly sure mine is in a more reasonable spot... so I'm going to guess ur screen is too small.
Try changing the zoom on your browser, it does actually have some effect, that might let you click the *on (say, do 70-80% zoom)

what do you mean? what browser you using? you c*ways change zoom, whether or not it affect the flash plugin within is a different story. I distinctly remember that it worked for 9 tails(for the running) when I was using my smaller laptop for it. I can't really try masuri screen since I've finished it thou.

Do note that if your focus is on the flash, then ctrl+scroll (or the mac equivalent of that, I don't use mac) might not work, instead you should go into your browser options and change it there by clicking some *ons.

Also, it have nothing to do with screen SIZE, but rather resolution, in the first place. 1080p will work perfectly where as a 720 might not.