I recreated most of the sprites using reference images, but for Bario and Luigo I found someone who uses the same pixel art website I use who recreated Mario and Luigi. I just recolored these since I couldn't figure out how to make them look good on my own. Here's a link to the original creator of the mario sprites: https://www.pixilart.com/art/mario-sprite-sheet-c8cb88f1ea7ee2d
Edit: I left a rating on your game!