why you call it top-down if they don't have up and down walking animations?
Viewing post in Wizard - Top Down Pixel Art Character Assets comments
Top-down perspective refers to a camera angle that shows players and the areas around them from above.
Top down will be better if they have up and down animations but nowaday alot of indie games use left and right animations only to save time , save budgets to make games.
some of popular indie games use only left and right animation are Stoneshard, kingdom rush , vampire survivor , Forager , the unliving ..etc