First one in case no one recognizes, the bottom of it spells
Mirror
in morse code.
The second image decodes into:
Good job! https://twitter.com/rrdmhhakca17
Re-arranging the end of the link spells darrm hack or something card. The link's ending is also 10 characters long or 12 including numbers. Mirroring it at the center doesn't help.
So looking at the HTML of the twitter link only things I see are:
Text: Good try, try again.
ID: 1634773476
Name: Try again
BackgroundColour: C0DEED
SidebarColour: DDEEF6
ScreenName: rrdmhhakca17
Since it's called the Caesar challenge, I assumed that it used the caesar cipher but it doesn't. If you try the decipher algorithm on twitter link, it'll print giberish like the following for all 26 possibilities:
rrdmhhakca
qqclgg`jb`
ppbkff_ia_
ooajee^h`^
nn`idd]g_]
mm_hcc\f^\
ll^gbb[e][
kk]faaZd\Z
jj\e``Yc[Y
ii[d__XbZX
hhZc^^WaYW
ggYb]]V`XV
ffXa\\U_WU
eeW`[[T^VT
ddV_ZZS]US
ccU^YYR\TR
bbT]XXQ[SQ
aaS\WWPZRP
``R[VVOYQO
__QZUUNXPN
^^PYTTMWOM
]]OXSSLVNL
\\NWRRKUMK
[[MVQQJTLJ
ZZLUPPISKI
YYKTOOHRJH
I've already tried rotating and flipping and decoding the images in every possible direction and angle. All print the same twitter link when decoded. Only thing I can think of is to split the image into two parts and mirror it at the center but doesn't make sense.
Combining Mirror + code = MirrorCode or CodeMirror and that's just some javascript website.
If you have to have a twitter to continue, then forget it. I refuse to sign up to solve this if need be.