The issue is with this line:
motion.x = min(motion.x + moveSpeed,maxSpeed)
Notice that its indent level matches that of the previous if
block. That effectively ends the if
block so the following elif
no longer makes sense.
I'm not sure what your intention is there. If that motion.x
line is intended to be part of the if
logic, indent it to indicate that. If it's not part of the if
logic, then it shouldn't be there at all and needs to be moved to wherever is appropriate.