First, I'd like to thank @(you need an account to see links) for helping me with that! And also I'd like to thank others that helped me on my boad!
I've researched the board that Mario linked to me and it was the solution, at least for me! So, I wanted to show a guide with images for be easier! If anyone is having problem with flash player and can't load your flash games, I reccomend following the following steps.
Note: I've tested only for Chrome and Opera. For Opera didn't worked for me because one of the steps didn't showed up. At the first time, just downloading the UB Origin was enough, but later I've followed these steps now to make it work.
First, of course, you should enable flash at Google Chrome!
After downloading UB, open the game you want to play, let's say you want to play... (you need an account to see links). It probably will show just a grey screen, right? So you've to click UB Origin Icon and then click at the 'Open Logger' option.
Then you're going to proceed to this page. You current tab on UB must be on Neopets game page link when doing this! Then you go to 'Filter Log content' and tap 'Blocked' option. If you don't see anything, just tap the refresh option. After doing this, you're going to see reds and yellows stuff like this.