Hi this is my first post here. I am making a maze game in mips that uses bitmap display and the Keyboard and Display MMIO Simulator for movement. I created my function that accepts the characters WASD and when I press any movement key the character moves infinitely in the direction I input. For example, pressing W once causes my character to keep moving right until my MARS crashes. I only want it to move once and then wait for a new input. Attached below is the code I am trying to debug. If possible I want to implement the jr $ra register into my code. Thanks

.eqv characterPos $t5

gameUpdateLoop:

        lw      $t3, 0xffff0004     # get input from user, then call appropriate movement function
    
        beq    $t3, 100, moveRight      # input d = move right
        beq    $t3, 97, moveLeft        # input a = move left
        beq    $t3, 119, moveUp         # input w = move up
        beq    $t3, 115, moveDown       # input s = move down
        beq    $t3, 120, exitGame       # input x = exit game
    
        jal gameUpdateLoop
    
moveRight:
        ### MOVE RIGHT ###
    
    addi characterPos, characterPos, 4
    sw  $t6, 0($t5)
    
    j gameUpdateLoop
moveLeft:
        ### MOVE LEFT ###

    addi characterPos, characterPos, -4
    sw  $t6, 0($t5)

    j gameUpdateLoop
moveUp:
        ### MOVE UP ###

    addi characterPos, characterPos, -256
    sw  $t6, 0($t5) 

    j gameUpdateLoop

moveDown:
        ### MOVE DOWN ###

    addi characterPos, characterPos, 256
    sw  $t6, 0($t5) 
    
    j gameUpdateLoop
    
exitGame:
    li $v0 10 
    syscall

I tried using jal instead of j to call back gameUpdateLoop. I am not sure what else can be the problem