This is pretty good, i feel like Godot gonna be my engine. Also not a bug but when Mario falls while runing the sprite is wrong (i think) i think it should be the default fall sprite, but its a small thing so i dont care. Keep it up pal!
the spikes dont work, anyway the game is good , add some music, ill let you borrow my music if you ever need it, its not pretty good but its creative commons