nic this looks AWESOME so far!! i love how you separated the foreground + background elements with value and how cohesive all your pixel art is. it's sooo nice. great work on getting movement and collisions also! since this game is a platformer i might suggest that you play with some of the platforming "feel". jumps are pretty core to platformers so it can make a lot of difference to make them feel right. i think when you get to the level design you can start tweaking it more but i would look at other platformers and try to figure out feels good about them. anyway great work!! i'm excited to see more of your game!