64 x 64 is tiny. look through past game submissions.
i found a plugin for pixel-perfect scaling for RPG Maker. i think you will just have to set your game resolution to 64x64 and it should take care of the rest probably. i have no idea how to change the game resolution since i have never used RPG Maker.
btw, i searched google for “low resolution with rpg maker” and checked out some of the results until i found a reddit post that mentioned that plugin. you can often find answers on your own by doing this first!