My Visual Basic program run memory game don't turn out like I expected

hi I'm new to coding, I'm have a Visual Basic project for the memory game. it basically lets the player flips over 2 cards, if those 2 cards match, they disappear, if they don't, they flip back. the game end when all the cards disappear. I have completed the code but when I run it, it just let me flip the cards when I click; the matched cards didn't disappear, and when time out the msg box don't show up. I don't know what is wrong with my code, and Im new so I only use basic statement like if else, for next, do while,...and I use Visual Basic 2013
Please help this is my code:
Public Class Easy    'times    Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick        lblEasyTime.Text = Val(lblEasyTime.Text) - 1        If lblEasyTime.Text = 0 Then Timer1.Enabled = False    End Sub    Sub check()        'Private Sub Easy_Load(sender As Object, e As EventArgs) Handles MyBase.Load        'Declare Variable        Dim imgCardback(5) As PictureBox        Dim imgCardfront(5) As PictureBox        Dim intGuesses As Integer        Dim intX As Integer        Dim intY As Integer        'Initialize variables        imgCardback(0) = imgJHeart        imgCardback(1) = imgJHeart2        imgCardback(2) = imgKHeart        imgCardback(3) = imgKHeart2        imgCardback(4) = imgQHeart        imgCardback(5) = imgQHeart2        imgCardfront(0) = imgCard1        imgCardfront(1) = imgCard2        imgCardfront(2) = imgcard3        imgCardfront(3) = imgcard4        imgCardfront(4) = imgcard5        imgCardfront(5) = imgcard6        intGuesses = 0        'Check images        For intX = 0 To 5            If imgCardfront(intX).Visible = False Then                For intY = 0 To 5                    If imgCardfront(intY).Visible = False Then                        If intX <> intY And imgCardback(intX).Tag = imgCardback(intY).Tag Then                            imgCardback(intX).Visible = False                            imgCardback(intY).Visible = False                            imgCardfront(intX).Visible = False                            imgCardfront(intY).Visible = False                            intGuesses = intGuesses + 1                        End If                        If intX <> intY And imgCardback(intX).Tag <> imgCardback(intY).Tag And imgCardback(intX).Visible = True And imgCardback(intY).Visible = True Then                            imgCardfront(intX).Visible = True                            imgCardfront(intY).Visible = True                            intGuesses = intGuesses + 1                        End If                    End If                Next            End If        Next        If imgCard1.Visible = False And imgCard1.Visible = False And imgCard1.Visible = False And imgCard1.Visible = False And imgCard1.Visible = False And imgCard1.Visible = False And imgJHeart.Visible = False And imgJHeart2.Visible = False And imgKHeart.Visible = False And imgKHeart2.Visible = False And imgQHeart.Visible = False And imgQHeart2.Visible = False Then            Me.Hide()            Congratulation.Visible = True        End If        Do While lblEasyTime.Text = 0            MsgBox("Times out!!! Better luck next time.")        Loop    End Sub    Private Sub imgCard1_Click(sender As Object, e As EventArgs) Handles imgCard1.Click        imgCard1.Visible = False    End Sub    Private Sub imgCard2_Click(sender As Object, e As EventArgs) Handles imgCard2.Click        imgCard2.Visible = False    End Sub    Private Sub imgcard3_Click(sender As Object, e As EventArgs) Handles imgcard3.Click        imgcard3.Visible = False    End Sub    Private Sub imgcard4_Click(sender As Object, e As EventArgs) Handles imgcard4.Click        imgcard4.Visible = False    End Sub    Private Sub imgcard5_Click(sender As Object, e As EventArgs) Handles imgcard5.Click        imgcard5.Visible = False    End Sub    Private Sub imgcard6_Click(sender As Object, e As EventArgs) Handles imgcard6.Click        imgcard6.Visible = False    End Sub End Class