Welcome to my new and updated pen scrolling platformer engine! Use arrows to move and "r" to restart. Blue is solid ground, red kills you, yellow is bouncy, purple is a jump-through platform, and green teleports you to the next level. You can wall jump.
This project now has WASD support, Courtesy of the Solar Wind Organization https://scratch.mit.edu/discuss/topic/232632/?page=1#post-2365438