If the artwork is your, there really is not issue. (GCH propitiatory format notwithstanding). The sprites look good. Do they have other animations, or just walking in 4 directions. I generally work in 24x32 sprites with a 16x16 tileset. Even the art I use has issues (some characters are based on RPG Maker (2003 or before) meaning old enough nobody cares anymore ... as long as I keep a low profile.
Example BSC based on humbird0 work ...