diff --git a/calculator.cabal b/calculator.cabal
--- a/calculator.cabal
+++ b/calculator.cabal
@@ -1,5 +1,5 @@
 name:                calculator
-version:             0.2.0.1
+version:             0.2.0.2
 synopsis:            A calculator repl.
 description:         A calculator repl that processes mathematical expressions.
                      Does basic arithmetic, and provides pre-defined basic mathematical functions.
diff --git a/src/Calculator/Evaluator/Base.hs b/src/Calculator/Evaluator/Base.hs
--- a/src/Calculator/Evaluator/Base.hs
+++ b/src/Calculator/Evaluator/Base.hs
@@ -10,7 +10,7 @@
 --------------------------------------------------------------------------------
 
 import           Control.Applicative            ((<*))
--- import           Data.List                      (nub)
+import           Data.List                      (nub)
 import           Text.ParserCombinators.Parsec  (eof, parse)
 
 --------------------------------------------------------------------------------
@@ -26,8 +26,7 @@
 result e =
   case e of
    Left (Constant c) -> Left $ " == " ++ show c
---   Left (Message x)  -> Left . init . unlines . map (" !! " ++ ) . nub $ x
-   Left (Message x)  -> Left . init . unlines . map (" -!- " ++ ) $ x
+   Left (Message x)  -> Left . init . unlines . map (" -!- " ++ ) . nub $ x
    Right b           -> Right b
    Left _            -> Left " ~~ Erroneous Result ~~"
 
diff --git a/src/Calculator/Help.hs b/src/Calculator/Help.hs
--- a/src/Calculator/Help.hs
+++ b/src/Calculator/Help.hs
@@ -2,7 +2,9 @@
 
 --------------------------------------------------------------------------------
 
-import           Calculator.Prim.Definitions (binaryOps, defFuns, defVars)
+import           Calculator.Color            (bold)
+import           Calculator.Prim.Definitions (binaryOps, defFuns, defVars,
+                                              unaryOps)
 
 --------------------------------------------------------------------------------
 
@@ -11,19 +13,17 @@
 --------------------------------------------------------------------------------
 
 help :: [String]
-help = [ "Commands:"
+help = [ bold "Commands:"
        , "   :var x=pi          -- Binds x to pi"
        , "   :func f(x)=x+1     -- Binds f(x) to \"x + 1\""
-       , "   :func f(x,y)=x+y   -- Binds f(x) to \"x + 1\""
+       , "   :func f(x,y)=x+y   -- Binds f(x) to \"x + y\""
        , "   :reset             -- Reset variable and function bindings"
        , "   :show              -- Display all variable bindings"
        , "   :? or :help        -- Display this help message"
-       , ""
-       , "Supported Operations: " ++ intersperse ' ' (map fst binaryOps)
-       , ""
-       , "Pre-defined variables: " ++ intercalate ", " (map fst defVars)
-       , ""
-       , "Provided Functions: "
+       , bold "Unary Operators: " ++ intersperse ' ' (map fst unaryOps)
+       , bold "Binary Operators: " ++ intersperse ' ' (map fst binaryOps)
+       , bold "Pre-defined variables: " ++ intercalate ", " (map fst defVars)
+       , bold "Provided Functions: "
        , "   " ++ intercalate ", " (map fst defFuns)
        ]
 
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -6,6 +6,7 @@
 
 --------------------------------------------------------------------------------
 
+import           Calculator.Color            (Color (..), bold, color)
 import           Calculator.Evaluator.Base   (evaluate)
 import           Calculator.Prim.Bindings    (Bindings)
 import           Calculator.Prim.Definitions (defBinds)
@@ -23,7 +24,7 @@
 
 repl :: Bindings -> Repl ()
 repl b = do
-  input <- getInputLine "calc> "
+  input <- getInputLine $ color Red True "calc> "
   case input of
     Nothing  -> return ()
     Just inp -> case evaluate b inp of
@@ -38,6 +39,7 @@
                ++ showVersion version
                ++ ". Use :? for help."
   runInputT defaultSettings (repl defBinds)
-  putStrLn "Please report issues at: github.com/sumitsahrawat/calculator/issues"
+  putStrLn $ "Please report issues at: " ++
+       bold "https://github.com/sumitsahrawat/calculator/issues"
 
 --------------------------------------------------------------------------------