Minecraft Omega 1.7

Hello, this is something that I've come across when I was 8, I never had Minecraft, so I decided to do what a normal 8-years-old would do: search "free minecraft dawwnload 2013" -- I downloaded the first result, I opened it up and it opened up the launcher, I played for a while in 1.7.4 until I died to a creeper, I saw people playing in Beta 1.7 sometimes to find the farlands which I've seen multiple videos of too. I wanted to find the farlands, I googled: "ow to change fersion on minecraft?", I went to change my version, I scrolled down to find Beta 1.7 but I accidentally pressed "Omega 1.7" -- I did not notice this. Upon starting up a new world, I found it look very different than Minecraft 1.7.4, I ignored it because it was an old version. I googled how to get to the farlands being in "Beta 1.7" which was actually "Omega 1.7" -- Upon getting there I was very proud to achieve it, however there was one thing that was wrong, the closer I got to the farlands the more my screen started glitching and displaying weird text like "GsrH^rH/ZoO?qFHg\"zXiVVKbKzHGz*Hl?|WIMG YvORvEv RG KoVzHV". This scared me alot. Then a weird box appeared in the middle of the farlands that looks like this: I pressed it, not knowing what would happen. For a split second this text appeared: .bn fligive ,nlptfivg ozh pV and the game crashed. I still want to know what that weird figure was, because I know for sure that was a skin of some sort, I sometimes feel like I see that skin in my multiplayer worlds I have currently. This was the title screen: