it's a nice simple game for sure! the controls were tight and nice to play with even tho the hitboxes for the spikes should be a lil smaller yk, you shouldn't make the hitbox exactly the size of the actual sprite, also there weren't music (the one at the start counts maybe?) sadly plus there were only few sound effects and maybe you should try to change the jump sound so the player doesn't get annoyed by it yk, now the curses idea where it changes up some gameplay aspects is pretty fire and you should try to add more to spice up the game even more, the art is pretty simple but you can def keep practicing and keep making games and you'll slowly but surely get better at the art, my art isn't the best but i got better since my first game lol, also i've tried to "speedrun" it and this was my time(down below), but yeah good job nonetheless
you can try out my game if you want and maybe drop some feedback there if you want :)