**WARNING** Hitting walls while scrolling can currently cause you to get stuck in them. Because of this, I'd recommend not using low scroll ranges. I'm looking into this now. Use WASD/the arrow keys to move. Press jump while moving into a wall to wall jump. This is a scrolling platformer engine I made based on my previous scrolling engine. I'm planning to release a few levels with this at some point, so be sure to follow me to stay updated! Use this however you want, but if you do then please give credit. If you make a project with it, feel free to share it in the comments. If you find any glitches or have any suggestions share them in the comments.
I made everything except the death sound, which is the thwomp sound effect from super paper mario and the polar bear which is a default scratch sprite. @Uniquename1 helped me to fix a collision glitch in fullscreen mode. There's comments inside to help you use this in your own project and, if enough people want it, I could fully comment this to explain how it works.